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Flower bud fly infestation and its relationship with the morphological and phenological aspects of sour passion fruit (Passiflora edulis) in southern Santa Catarina state

Infestação da mosca-do-botão-floral e sua relação com aspectos morfológicos e fenológicos do maracujazeiro-azedo (Passiflora edulis) no sul de Santa Catarina

Abstract

The objective of this work was to evaluate the infestation of the flower-bud-fly in different sizes of flower buds and to relate the infestation with the plant phenology and weather variables. In the 2017/18 and 2018/19 seasons, flower buds of plants were collected to obtain pupae, adults, and parasitoids in a commercial orchard of sour passion fruit, in Sombrio, state of Santa Catarina. The level of infestation, pupal viability, and percentage of parasitism were calculated. Every fortnight, the vegetative and reproductive structures of 12 orchard plants (0.25 m² per plant), randomly distributed, were monitored, as soon as they reached the height of the trellis. Three population peaks of the floral bud fly were observed in the seasons, which preferred to oviposit in buds larger than 2 cm. The critical period for pest monitoring and control occurred between November and December. The average temperature and precipitation were the main factors that influenced the production of sour passion fruit. The average temperature was correlated with the emission of flower buds and the emergence of lonqueids. D. inedulis was the predominant species in flower buds, in which Dasiopssp.1, Dasiops sp. 2, and Neosilba certa were reported for the first time. It was also the first report of Utetes anastrephae and Aganaspis pelleranoias parasitoids of larvae-pupae of the flower bud fly of the sour passion fruit tree in Santa Catarina.

Index terms
Lonchaeidae; parasitoids; population fluctuation; temperature

Resumo

O objetivo deste trabalho foi avaliar a infestação da mosca-do-botão-floral, em diferentes tamanhos de botão floral, e relacionar a infestação com a fenologia da planta e variáveis meteorológicas. Nas safras de 2017/2018 e 2018/2019, foram coletadosbotões florais das plantas para obtenção de pupas, adultos e parasitoides, em umpomar comercial de maracujazeiro-azedo, em Sombrio-SC. Foi calculado o nível de infestação, aviabilidade pupal e o percentual de parasitismo. Quinzenalmente, foram monitoradas estruturas vegetativas e reprodutivas de 12 plantas do pomar (0,25 m² por planta), distribuídas ao acaso,assim que atingiram a altura da latada. Ocorreram três picos populacionais damosca-do-botão-floral nas safras, que preferiu ovipositar em botões maiores de 2 cm. Operíodo crítico para monitoramento e controle da praga ocorreu entre novembro e dezembro. A temperatura e a precipitação médias foram os principais fatores que influenciaram aprodução de frutos de maracujazeiro-azedo. A temperatura média foi correlacionada com aemissão de botões florais e na emergência de lonqueídeos. D. inedulis foi a espéciepredominante nos botões florais, sendo relatadas pela primeira vez, Dasiops sp. 1, Dasiops sp. 2, e Neosilba certa. Também foi o primeiro relato de Utetes anastrephae e Aganaspis pelleranoi como parasitoides de larvas-pupas da mosca-do-botão-floral do maracujazeiro-azedoem Santa Catarina.

Termos para indexação
Lonchaeidae; flutuação populacional; temperatura; parasitoides

Introduction

Passion fruit (Passiflora edulis Sims) is native to Brazil (CERQUEIRA-SILVA., 2014 CERQUEIRA-SILVA, C.B.M.; JESUS, O.N.; SANTOS, E.S.L.; CORRÊA, R.X.; SOUZA, A.P. Genetic breeding and diversity of the genus passiflora: progress and perspectives in molecular and genetic studies. International Journal of Molecular Sciences, Basel, v.15, p.14122-52, 2014. Disponível em: https://www.alice.cnptia.embrapa.br/alice/handle/doc/1005585. Acesso em: 29 ago. 2022.
https://www.alice.cnptia.embrapa.br/alic...
) and its production is important for Brazilian fruit growing, with about 700 thousand tons produced in 2010 and an average yield of 15.26 t ha-1 (IBGE, 2021 IBGE. Produção agrícola municipal: maracujá. Rio de Janeiro, 2021. Disponível em: https://sidra.ibge.gov.br/tabela/5457#resultado. Acesso em: 03 abr. 2023.
https://sidra.ibge.gov.br/tabela/5457#re...
). The Brazilian northeast region stands out as the leading producer (69.59%), followed by the southeast (11.78%) and south (10.71%). In the State of Santa Catarina, the average production yield in 2021 was 25.16 t ha-1, which is higher than the national average (IBGE, 2021 IBGE. Produção agrícola municipal: maracujá. Rio de Janeiro, 2021. Disponível em: https://sidra.ibge.gov.br/tabela/5457#resultado. Acesso em: 03 abr. 2023.
https://sidra.ibge.gov.br/tabela/5457#re...
).

One factor that can reduce the production and yield of the crop is the occurrence of insect pests, such as the passion fruit flower bud fly, Dasiops inedulis Sims. (Diptera, Lonchaeidae), which have been growing in importance and standing out as one of the main phytosanitary problems to be tackled.

Its infestation can lead to an early fall of flower buds and fruits and, in most cases, generate economic losses for the farmer (NORRBOM; MCALPINE, 1997 NORRBOM, A.L.; MCALPINE, J.F. A revision of the neotropical species of Dasiops Rondani (Diptera: Lonchaeidae) attacking Passiflora (Passifloraceae). Memorial Entomological Society of Washington, Philadelphia, n.18, p.189-211, 1997. ; AGUIAR-MENEZES, 2004 AGUIAR-MENEZES, E.L.; NASCIMENTO, R.J.; MENEZES, E.B. Diversity of fly species (Diptera: Tephritoidae) from Passifloraspp. and their hymenopterous parasitoids in two municipalities of the Southeastern Brazil. Neotropical Entomology, Dordrecht, n.33, v.1, p.113-6, 2004. Disponível em: https://www.scielo.br/j/ne/a/vmvJ7ZT5LW9cLqd59LrnknD/?lang=en. Acesso em: 26 ago. 2022.
https://www.scielo.br/j/ne/a/vmvJ7ZT5LW9...
; LEMOS et al., 2015 LEMOS, L. do N.; ADAIME, R.; COSTA-NETO, S.V.; DEUS, E. da G.; JESUS-BARROS, C.R. de; STRIKIS, P.C. New findings on Lonchaeidae (Diptera: Tephritoidea) in the Brazilian Amazon. Florida Entomologist, Gainesville, v.98, n.4, 2015. Disponível em: https://www.embrapa.br/busca-de-publicacoes/-/publicacao/1032737/new-findings-on-lonchaeidae-diptera-tephritoidea-in-the-brazilian-amazon. Acesso em: 26 ago. 2022.
https://www.embrapa.br/busca-de-publicac...
).

Two genera of the Lonchaeidae family, Dasiops and Neosilba, have been reported to cause damage to passion fruit growing in Colombia and Peru, particularly the species D. inedulis (NORRBOM; MCALPINE, 1997 NORRBOM, A.L.; MCALPINE, J.F. A revision of the neotropical species of Dasiops Rondani (Diptera: Lonchaeidae) attacking Passiflora (Passifloraceae). Memorial Entomological Society of Washington, Philadelphia, n.18, p.189-211, 1997. ; AGUIAR-MENEZES et al., 2004 AGUIAR-MENEZES, E.L.; NASCIMENTO, R.J.; MENEZES, E.B. Diversity of fly species (Diptera: Tephritoidae) from Passifloraspp. and their hymenopterous parasitoids in two municipalities of the Southeastern Brazil. Neotropical Entomology, Dordrecht, n.33, v.1, p.113-6, 2004. Disponível em: https://www.scielo.br/j/ne/a/vmvJ7ZT5LW9cLqd59LrnknD/?lang=en. Acesso em: 26 ago. 2022.
https://www.scielo.br/j/ne/a/vmvJ7ZT5LW9...
; WYCKHUYS et al., 2012 WYCKHUYS, K.A.G.; KORYTKOWSKI, C.; MARTINEZ, J.; HERRERA, B.; ROJAS, M.; OCAMPO, J. Species composition and seasonal occurrence of Diptera associated with passionfruit crops in Colombia. Crop Protection, Amsterdam, n.32, p.90-8, 2012. Disponível em: https://www.sciencedirect.com/science/article/abs/pii/S0261219411003255. Acesso em: 26 ago. 2022. ). In these countries, the flower bud fly has already been one of the main pests of Passifloraceae for over three decades, and the use of hydrolyzed corn protein for monitoring adults is recommended (WYCKHUYS et al., 2012 WYCKHUYS, K.A.G.; KORYTKOWSKI, C.; MARTINEZ, J.; HERRERA, B.; ROJAS, M.; OCAMPO, J. Species composition and seasonal occurrence of Diptera associated with passionfruit crops in Colombia. Crop Protection, Amsterdam, n.32, p.90-8, 2012. Disponível em: https://www.sciencedirect.com/science/article/abs/pii/S0261219411003255. Acesso em: 26 ago. 2022. ; QUINTERO et al., 2012 QUINTERO, E.M.; LÓPEZ, I.C.; KONDO, T. Manejo integrado de plagas como estratégia para el control de la mosca del botón floral del maracuyá Dasiops inedulis Steyskal (Diptera: Lonchaeidae). Corpoica – Ciencia y Tecnologia Agropecuária, Bogotá, n.13, v.1, p.31-40, 2012. Disponível em: https://www.redalyc.org/articulo.oa?id=449945032004. Acesso em: 26 ago. 2022.
https://www.redalyc.org/articulo.oa?id=4...
; CARRERO et al., 2013 CARRERO, D.A.; MELO, D.; URIBE, S.; WYCKHUYS, K.A.G. Populations dynamics of Dasiops inedulis (Diptera: Lonchaeidae) and its biotic and abiotic mortality factors in Colombian sweet passionfruit orchards. Journal of Pest Science, Heidelberg, n.86, p.438-47, 2013. Disponível em: https://link.springer.com/article/10.1007/s10340-013-0487-9. Acesso em: 26 ago. 2022.
https://link.springer.com/article/10.100...
; SALAZAR-MENDONÇA et al., 2019 SALAZAR-MENDONZA, P.A.; PERALTA-ARAGÓN, I.E.; MISAILIDIS, M.L.; ROMERO-RIVAS, L.C.; STRIKIS, P.C. Lance flies associated with sweet passion fruit and contributions to the knowledge on Lonchaeidae in Peru. Arquivos do Instituto Biológico, São Paulo, v.86, p.1-4, 2019. Disponível em: https://www.scielo.br/j/aib/a/BNqxKHy7HGptrLnztmDNbwz/?lang=en. Acesso em: 26 ago. 2022.
https://www.scielo.br/j/aib/a/BNqxKHy7HG...
). In Colombia, Integrated Pest Management – IPM strategies were established for D. inedulis, by associating the monitoring of adults with hydrolyzed corn protein and that of larvae in flower buds of 30 plants per hectare, considering the level control when 30% of the buds have larvae (QUINTERO et al., 2012 QUINTERO, E.M.; LÓPEZ, I.C.; KONDO, T. Manejo integrado de plagas como estratégia para el control de la mosca del botón floral del maracuyá Dasiops inedulis Steyskal (Diptera: Lonchaeidae). Corpoica – Ciencia y Tecnologia Agropecuária, Bogotá, n.13, v.1, p.31-40, 2012. Disponível em: https://www.redalyc.org/articulo.oa?id=449945032004. Acesso em: 26 ago. 2022.
https://www.redalyc.org/articulo.oa?id=4...
; SALAMANCA et al., 2015 SALAMANCA, L.; MANZANO, M. R.; BAENA, D.; TOVAR, D.; WYCKHUYS, K. A. G. Effect of simulated Dasiops inedulis (Diptera: Lonchaeidae) injury on yield and fruit quality parameter in yellow passionfruit. Journal of Economic Entomology, Maryland, n.108, v.1, p.201-19, 2015. Disponível em: https://academic.oup.com/jee/article/108/1/201/794786. Acesso em: 26 ago. 2022. ). More recently, Devia et al.(2020) DEVIA, E.H.V.; BAQUERO, P.V.S.; ÁLVAREZ, K.L.B.; GÓMEZ, C.S. Manejo de la mosca del botón floral en el maracuyá amarillo para el Huila. Mosquera, Colômbia: Agrosavia, 2020. 36p. Disponível em: https://editorial.agrosavia.co/index.php/publicaciones/catalog/book/171. Acesso em: 27 abr. 2023. , established as a control, the level of 10% of infested buds in orchards up to oneyear- old and 30% in two-year-old orchards.

In Brazil, D. inedulisis recorded as causing great damage to passion fruit orchards, where losses of up to 100% of production were reported (AGUIAR-MENEZES et al., 2004 AGUIAR-MENEZES, E.L.; NASCIMENTO, R.J.; MENEZES, E.B. Diversity of fly species (Diptera: Tephritoidae) from Passifloraspp. and their hymenopterous parasitoids in two municipalities of the Southeastern Brazil. Neotropical Entomology, Dordrecht, n.33, v.1, p.113-6, 2004. Disponível em: https://www.scielo.br/j/ne/a/vmvJ7ZT5LW9cLqd59LrnknD/?lang=en. Acesso em: 26 ago. 2022.
https://www.scielo.br/j/ne/a/vmvJ7ZT5LW9...
; LEMOS et al., 2015 LEMOS, L. do N.; ADAIME, R.; COSTA-NETO, S.V.; DEUS, E. da G.; JESUS-BARROS, C.R. de; STRIKIS, P.C. New findings on Lonchaeidae (Diptera: Tephritoidea) in the Brazilian Amazon. Florida Entomologist, Gainesville, v.98, n.4, 2015. Disponível em: https://www.embrapa.br/busca-de-publicacoes/-/publicacao/1032737/new-findings-on-lonchaeidae-diptera-tephritoidea-in-the-brazilian-amazon. Acesso em: 26 ago. 2022.
https://www.embrapa.br/busca-de-publicac...
). At the national level, studies focused on lonqueids that affect the passion fruit crop are concentrated on varietal resistance (JESUS-BARROS et al., 2015 JESUS-BARROS, C.R; ADAIME, R.; LIMA, A.L.; SANTOS, J.A. Ocorrência de Dasiops inedulis Steyskal (Diptera: Lonchaeidae) em maracujazeiro no Amapá. Macapá: Embrapa, 2015. (Comunicado técnico, 137). Disponível em: https://www.infoteca.cnptia.embrapa.br/handle/doc/1025251. Acesso em: 26 ago. 2022. ), infestation records (UCHÔA-FERNANDES et al., 2002 UCHÔA-FERNANDES, M.A.; OLIVEIRA, I.; MOLINA, R.M.S.; ZUCCHI, R.A. Species diversity of frugivorous fies (Diptera: Lonchaeidae) from hosts in the Cerrado of the State of Mato Grosso do Sul, Brazil. Neotropical Entomology, Dordrecht, n.31, v.4, p.515-24, 2002. Disponível em: https://www.scielo.br/j/ne/a/VNXRS64xQPsFPnqMhWbcDCt/abstract/?lang=en. Acesso em: 26 ago. 2022. ; 2003 UCHÔA-FERNANDES, M.A.; OLIVEIRA, I.; MOLINA, R.M.S.; ZUCCHI, R.A. Biodiversity of Frugivorous Flies (Diptera: Tephritoidea) Captured in Citrus Groves, Mato Grosso do Sul, Brazil. Neotropical Entomology, Dordrecht, v.32, n.2, p.239-46, 2003. Disponível em: https://www.scielo.br/j/ne/a/3j9yWVNXCX4BPRMbr6qVmVk/?lang=en. Acesso em: 31 mar. 2023.
https://www.scielo.br/j/ne/a/3j9yWVNXCX4...
; AGUIAR-MENEZES et al., 2004 AGUIAR-MENEZES, E.L.; NASCIMENTO, R.J.; MENEZES, E.B. Diversity of fly species (Diptera: Tephritoidae) from Passifloraspp. and their hymenopterous parasitoids in two municipalities of the Southeastern Brazil. Neotropical Entomology, Dordrecht, n.33, v.1, p.113-6, 2004. Disponível em: https://www.scielo.br/j/ne/a/vmvJ7ZT5LW9cLqd59LrnknD/?lang=en. Acesso em: 26 ago. 2022.
https://www.scielo.br/j/ne/a/vmvJ7ZT5LW9...
; OLIVEIRA; FRIZZAS, 2014 OLIVEIRA, C.M.; FRIZZAS, M.R. Principais pragas do maracujazeiro amarelo (Passiflora edulis f. flavicarpa Degener) e seu manejo. Planaltina: Embrapa Cerrados, 2014. 43p. (Documentos, 323). Disponível em: https://ainfo.cnptia.embrapa.br/digital/bitstream/item/124950/1/doc-323.pdf . Acesso em: 26 ago. 2022. ; PEREIRA et al., 2017 PEREIRA, B.E.; DE LORENZI, E.F.P.; HARTER-MARQUES, B. Primeiro registro de Dasiops spp. Rondani (1856) (Diptera: Lonchaeidae) em pomar comercial de Passiflora edulis Sims. (Passifloraceae) no Sul de Santa Catarina, Brasil. In: SIMPÓSIO BRASILEIRO SOBRE A CULTURA DO MARACUJAZEIRO, 7., 2017, Balneário Arroio do Silva, SC. Anais [...] Florianópolis, 2017. ; DE LORENZI et al., 2020 DE LORENZI, E.F.P.; EMERICK, B.; MORITZ, D.R.; PETRY, H.B. Estudo da flutuação populacional da mosca-do-botão floral no maracujazeiro-azedo por meio de armadilhas adesivas amarelas. Agropecuária Catarinense, Florianópolis, v.33, n.2, p.29-31, 2020. Disponível em: https://publicacoes.epagri.sc.gov.br/RAC/article/view/499. Acesso em: 26 ago. 2022. ), and indication of food attractant for control (HARTER-MARQUES et al., 2021 HARTER-MARQUES, B.; MICHELS, V.F.; PEREIRA, B.E.; DE LORENZI, E.F.P. Evaluation of different food attractants for capture of Lonchaeidae (Diptera: Tephritoidea) in passion fruit orchard in Southern Santa Catarina, Brazil. International Journal of Tropical Insect Science, Oxfordshire, v.41, n.2, p.1889-92, 2021. ).

Knowledge of taxonomy, damage, trophic relationships, and ecology of this family, associated with Passifloraceae, is still considered incipient (WYCKHUYS et al., 2012 WYCKHUYS, K.A.G.; KORYTKOWSKI, C.; MARTINEZ, J.; HERRERA, B.; ROJAS, M.; OCAMPO, J. Species composition and seasonal occurrence of Diptera associated with passionfruit crops in Colombia. Crop Protection, Amsterdam, n.32, p.90-8, 2012. Disponível em: https://www.sciencedirect.com/science/article/abs/pii/S0261219411003255. Acesso em: 26 ago. 2022. ; SALAZAR-MENDONZA et al., 2019 SALAZAR-MENDONZA, P.A.; PERALTA-ARAGÓN, I.E.; MISAILIDIS, M.L.; ROMERO-RIVAS, L.C.; STRIKIS, P.C. Lance flies associated with sweet passion fruit and contributions to the knowledge on Lonchaeidae in Peru. Arquivos do Instituto Biológico, São Paulo, v.86, p.1-4, 2019. Disponível em: https://www.scielo.br/j/aib/a/BNqxKHy7HGptrLnztmDNbwz/?lang=en. Acesso em: 26 ago. 2022.
https://www.scielo.br/j/aib/a/BNqxKHy7HG...
). Thus, the objective of this work was to evaluate the infestation of the flower bud fly in different sizes of flower buds and to relate the infestation with the plant phenology and meteorological variables, serving as a basis for the establishment of strategies of integrated pest management.

Material and Methods

The experiment was carried out in a commercial passion fruit orchard located between the coordinates 29°06’14.8” S and 49°62’54.1” W, altitude of 22 m, in the municipality of Sombrio, in the extreme south of Santa Catarina. During the execution of the experiment, the orchard received routine cultural treatments, such as mowing to maintain spontaneous vegetation about 10 cm high, the use of herbicides in the cultivation line and fungicides, and the use of mineral fertilizers. The producer was instructed to suspend the use of insecticides in the experimental area so as not to influence data collection. The municipality of Sombrio has a Cfa-type climate, according to the Köppen classification (ALVARES et al., 2013 ALVARES, C.A.; STAPE, J.L.; SENTELHAS, P.C.; DE MORAES GONÇALVES, J L.; SPAROVEK, G. Köppen's climate classification map for Brazil. Meteorologische Zeitschrift, Berlin, v.22, n.6, p.711-28, 2013. Disponível em: https://www.schweizerbart.de/papers/metz/detail/22/82078/Koppen_s_climate_classification_map_for_Brazil?af=crossref. Acesso em: 26 ago. 2022. ) with a humid subtropical climate and hot summers.

The average annual temperature was 19.9°C and rainfall was 1,671 mm (CLIMATEMPO, 2022 CLIMATEMPO. Climatologia em Sombrio, BR. 2022. Disponível em: https://www.climatempo.com.br/climatologia/4698/sombrio-sc. Acesso em: 29 ago. 2022.
https://www.climatempo.com.br/climatolog...
).

The work was carried out in the 2017/18 and 2018/19 harvests, from November to May, through the collection of floral buds and the evaluation of the fluctuation of lonqueids and level of infestation per collection date.

During the 2017/18 season, an area of one hectare was split into 20 sampling points where, every two weeks, 10 flower buds were collected from the plants, regardless of size, totaling 200 buds per collection date.

The flower buds were transported to the laboratory in paper bags and subsequently placed in plastic trays lined with paper towels and covered with voile fabric, and kept under controlled conditions (BOD at 25±1°C; 70% RH; in the dark). Over two weeks, the presence of pupae was counted daily and placed in Petri dishes, covered with filter paper moistened with distilled water, and also kept in a BOD chamber for the emergence of adult flies and their parasitoids. In the 2018/19 season, in the same area, from November to May, flower buds were collected fortnightly directly from the plants to determine, in addition to the fluctuation of lonqueids and the level of infestation in the flower buds, the existence of preference for oviposition per size of flower bud, where 30 buds of 0-2 cm, 2.1-3 cm, and 3.1-5 cm sizes were collected with the aid of a plasticized card template.

The emergence of adults was monitored daily and the emerged flies were fed with a 5% molasses solution, allowing the full extension of their wings. Emerged individuals were stored in 70% alcohol 24 h after emergence.

For the two assessed seasons, infestation rates (1), pupal viability (2), and percentage of parasitism (3) were calculated using the following formulas:

(1) %IF = (total number of the obtained pupas / total number of collected buds) * 100

(2) %VP = (total number of emerged adults /total number of obtained pupas) * 100

(3) %P = (total number of emerged parasitoids / total number of obtained pupa) * 100

Lonchaeidae adult individuals that emerged from flower buds were identified using entomological taxonomic keys at the genus and species level, whenever possible (MCALPINE, 1987 McALPINE, J.F. Lonchaeidae. In: MCALPINE, J.F.; PETERSON, B.V.; SHEWELL, G.E.; TERKEY, H.J.; VOKEROTH, J.R.; WOOD, D.M. (ed.) Manual of neartic diptera. Otawa: Agriculture Canada Monograph, 1987. v.2, p.791-7. ; NORRBOM; MCALPINE, 199 NORRBOM, A.L.; MCALPINE, J.F. A revision of the neotropical species of Dasiops Rondani (Diptera: Lonchaeidae) attacking Passiflora (Passifloraceae). Memorial Entomological Society of Washington, Philadelphia, n.18, p.189-211, 1997. 7, HERNANDEZ, 2011 HERNANDEZ, R.E.G. Revisión taxonômica parcial del gênero Dasiops Rondani (Diptera Lonchaeidae) em la region neotropical. 2011. Dissertação (Mestrado em Entomologia Geral) - Universidade do Panamá, Cidade do Panamá, 2011. ). The emerged parasitoids were identified by the expert taxonomist in the group, Dr. Jorge Anderson Guimarães (Embrapa/CNPH), and the vouchers deposited in the entomological collection of the Entomology Department of Embrapa Hortaliças, in Brasília, DF.

The emission of flower buds (less than or equal to 2 cm and greater than 2.1 cm to 5 cm) and fruits of 12 plants in the orchard, chosen at random, was monitored from September 2018 to March 2019. The monitoring of vegetative and reproductive structures of these plants was carried out fortnightly, using a 0.25 m² wooden frame, to standardize the evaluated area of each plant. Monitoring started from the moment the plant reached the trellis wire and, as the plants developed, the coverage area was increased, to monitor their development on the trellis wire, on one side of the plant, until reaching 1 m² of the evaluated canopy area. On each evaluation date, the number of flower buds, flowers, pollinated flowers, and fruits present in the evaluated area was counted (adapted from CARRERO et al., 2013 CARRERO, D.A.; MELO, D.; URIBE, S.; WYCKHUYS, K.A.G. Populations dynamics of Dasiops inedulis (Diptera: Lonchaeidae) and its biotic and abiotic mortality factors in Colombian sweet passionfruit orchards. Journal of Pest Science, Heidelberg, n.86, p.438-47, 2013. Disponível em: https://link.springer.com/article/10.1007/s10340-013-0487-9. Acesso em: 26 ago. 2022.
https://link.springer.com/article/10.100...
). The average number of each reproductive structure evaluated per plant was estimated, through the proportionalities of the value obtained in the samples, in the area evaluated in each plant, concerning the area occupied by them in the function of their spacing (6 m² per plant - spacing of 3 x 2 m) over the study period.

The climatic parameters of average temperature and precipitation were obtained from a meteorological station located in the municipality of Sombrio, provided by EPAGRI/ CIRAM (EPAGRI, 2020 EPAGRI - Empresa de Pesquisa Agropecuária e Extensão Rural de Santa Catarina. Banco de dados de variáveis ambientais de Santa Catarina. Florianópolis: Epagri, 2020. 20p. (Documentos, 310) ) and, used in correlation with data on population fluctuation of flies in flower buds and with the aspects phenology of the sour passion fruit followed in the second harvest of the experiment. From the collected data, a Box Plot graph was constructed to evaluate the infestation rate of the floral bud flies in the different sizes of collected buds. In addition, regression charts were also set up to check the normality of both the data and their residuals. Once normality was not met, it was decided to use the non-parametric Kruskal-Wallis test, at a probability level of 5% and, to observe where the differences were in the emergence, the Dunn Post Hoc Test was used ( MANGIAFICO, 2016 MANGIAFICO, S.S. Summary and analysis of extension program evaluation in R. Version 1.19.10. New Brunswick: Rutgers Cooperative Extension, 2016. Disponível em: https://rcompanion.org/handbook/F_08.html. Acesso em: 30 ago. 2022. ).

To evaluate the effect of climatic parameters, both on the emergence of the lonqueids and on the phenology, the data were plotted in scatter plots and analyzed regarding their normality and their residues. Given that the assumptions of normality were not met, a correlation test was used by Kendall’s Tau method (MANGIAFICO, 2016 MANGIAFICO, S.S. Summary and analysis of extension program evaluation in R. Version 1.19.10. New Brunswick: Rutgers Cooperative Extension, 2016. Disponível em: https://rcompanion.org/handbook/F_08.html. Acesso em: 30 ago. 2022. ). All graphics and tests were prepared in the R program (R DEVELOPMENT CORE TEAM, 2021 R DEVELOPMENT CORE TEAM. R: a language and environment for statistical computing. Vienna: R Foundation for Statistical Computing, 2021. ).

Results and Discussion

In the 2017/18 harvest, 2,000 flower buds were collected and from these, 50 pupae of lonqueids were obtained, out of which 34 adults emerged and 28 were identified as D.inedulis and one as Neosilba certa (WALKER, 1850). In the 2018/19 harvest, 1,260 flower buds were collected. Of this amount, 545 pupae were obtained, out of which 394 adults emerged, enabling the identification of 167 D. inedulis females and two Dasiopssp. 1 and Dasiops sp. 2 females.

The bud infestation rate and pupal viability in 2017/2018 harvest were 2.5% and 68%, respectively. From the collection of buds in the field, pupae were obtained in the laboratory for approximately 11.43 ± 7.42 days.

The pupal period lasted an average of 14.52 ± 6.57 days, that is, from pupation to adult emergence. The mean time and standard de viation to obtain pupae after the collection of flower buds was 5.5 ± 3.80 days, while the mean duration of the pupal period was 13.05 ± 18.94 days.

The percentage of parasitism of lonqueid pupae was 4.0% in the 2017/2018 harvest and 4.4% in the 2018/2019 season. The most abundant sampled family was Braconidae (Opiinae), with 16 individuals of the species Utetes anastrephae, followed by Figitidae (Eucoilinae), with 15 individuals, four specimens of Aganaspis pelleranoi (Brèthes, 1924) and 11 of the genus Ganaspis (it was not possible to identify them at the species level).

Regarding the preference of the fly for the different sizes of flower buds sampled in the 2018/2019 harvest, a lower rate of infestation of lonqueids emerged in 0-2 cm flower buds (25.24%) was found. For 3.1-5 cm flower buds, the highest infestation rate was recorded (66.19%) and for 2.1-3 cm buds, a rate of 45.48% (Figure 1) was observed.

The Kruskal-Wallis test showed a statistically significant difference (p = 0.004) between Dasiops spp. in the buds, and Dunn’s test revealed that this difference occurred between the 0-2 cm buds from the 2.1-3 cm buds (p= 0.01) and 3.1-5 cm buds (p = 0.03) (Table 1).

Figure 1
Infestation rates of lonqueids emerged in different sizes of flower buds sampled in a commercial passion fruit orchard, Sombrio, SC.

Table 1
Mean rank and standard error (SE) of flower bud fly emergence, infestation index (IV), and pupal viability (VA) per flower bud size.

In line with these results, Galindo et al.(2014) GALINDO, M.Y.S.; ÁVILA, A.P.C.; RAVELO, E.E.E.; BROCHERO, H.L.M. Caracterización de daños de moscas del género Dasiops (Diptera: Lonchaeidae) en Passiflora spp. (Passifloraceae) cultivadas en Colombia. Revista Facultad Nacional de Agronomía Medellín, n.67, v.1, p.7151-62, 2014. Disponível em: https://www.scinapse.io/papers/1602537277 . Acesso em: 26 ago. 2022.
https://www.scinapse.io/papers/160253727...
recorded D. inedulis infestation rates in orchards in Colombia of 20.3% in flower buds between 2-3 cm, with an average of one larva per bud, and 79.7% in flower buds with the length between 3.1-5 cm, with an average of two larvae per bud.

Peñaranda et al. (1986) PEÑARANDA, I.A.; ULLOA, P.C.; HERNÁNDEZ, M.R. Biología de la mosca de los botones florales del maracuyá Dasiops inedulis (Díptera: Lonchaeidae) en el Valle del Cauca. Revista Colombiana de Entomologia, Bogotá, v.12, n.1, 1986. show that small buds (less than 2 cm) hinder the complete development of the larvae and only allow the creation of one larva per bud, while buds with more than 3.5 cm were detected up to 12 larvae and all managed to complete their development. Thus, larger bud sizes promote the full development of the larvae.

Although D. inedulis has great potential to affect passion fruit production, experiments conducted by Salamanca et al. (2015) SALAMANCA, L.; MANZANO, M. R.; BAENA, D.; TOVAR, D.; WYCKHUYS, K. A. G. Effect of simulated Dasiops inedulis (Diptera: Lonchaeidae) injury on yield and fruit quality parameter in yellow passionfruit. Journal of Economic Entomology, Maryland, n.108, v.1, p.201-19, 2015. Disponível em: https://academic.oup.com/jee/article/108/1/201/794786. Acesso em: 26 ago. 2022. demonstrated that P. edulis has a mechanism of adaptation to herbivory by modifying the natural abortion rates of floral and fruit structures. The authors cited above observed that the plants began to suffer production losses only when the abortion rate was greater than 20%. At rates of less than 20%, these authors reported a capacity for compensatory action of the crop, mainly in orchards with well-nourished plants, under a manual pollination system, and at a more advanced phenological age.

If we consider 20% of abortion of flower buds as a pest control level, it is observed that, on average, this index was reached throughout this experiment, for all sizes of buds evaluated.

For example, in the 2017/2018 season, at the fly’s first peak in November, the infestation rate started at 10% and reached 30% by the end of the month. Afterward, it remained at 10% and, in February, at the second peak, it reached 40%. In the second assessed harvest, it was observed that in the 2.1-3 cm and 3.1-5 cm buds, the infestation rate reached 20% in March and progressively increased until reaching 40% in April.

Therefore, the importance of monitoring the flower bud fly throughout the crop’s production cycle is reinforced. However, it should be observed that there is still no established level of control for orchards in the extreme south of Santa Catarina. Furthermore, the work by Salamanca et al. (2015) SALAMANCA, L.; MANZANO, M. R.; BAENA, D.; TOVAR, D.; WYCKHUYS, K. A. G. Effect of simulated Dasiops inedulis (Diptera: Lonchaeidae) injury on yield and fruit quality parameter in yellow passionfruit. Journal of Economic Entomology, Maryland, n.108, v.1, p.201-19, 2015. Disponível em: https://academic.oup.com/jee/article/108/1/201/794786. Acesso em: 26 ago. 2022. was not conducted with natural infestations of the flower bud fly, but with damage simulation.

It should also be observed that this work focused on understanding the dynamics of infestation and population fluctuation of this fly, under natural conditions, throughout the crop’s production cycle and that there are still gaps in relation to how this fly behaves in the off season and the sanitary void.

It was observed in this experiment, an emergence of species of lonqueids from the flower buds of sour passion fruit that have not been reported yet. In addition to D. inedulis, two species of Dasiops emerged whose identifications were not possible so far, because they were not registered in any of the keys used and also because of the lack of a specialized taxonomist, and one individual of N.certa.

To date, in Brazil, only D. inedulis has been recorded in passion fruit buds (AGUIAR-MENEZES et al., 2004 AGUIAR-MENEZES, E.L.; NASCIMENTO, R.J.; MENEZES, E.B. Diversity of fly species (Diptera: Tephritoidae) from Passifloraspp. and their hymenopterous parasitoids in two municipalities of the Southeastern Brazil. Neotropical Entomology, Dordrecht, n.33, v.1, p.113-6, 2004. Disponível em: https://www.scielo.br/j/ne/a/vmvJ7ZT5LW9cLqd59LrnknD/?lang=en. Acesso em: 26 ago. 2022.
https://www.scielo.br/j/ne/a/vmvJ7ZT5LW9...
; RAGA et al., 2015 RAGA, A.; DE SOUZA-FILHO, M.F.; STRIKIS, P.C.; MONTES, S.M.N.M. Lance fly (Diptera: Lonchaeidae) host plants in the State of São Paulo, Southeast Brazil. Entomotropica, Macaray, v.30, n.7, p.57-68, 2015. Disponível em: http://mosfrut.com.br/PDF/2015,%20A.%20RAGA.pdf. Acesso em: 26 ago. 2022.
http://mosfrut.com.br/PDF/2015,%20A.%20R...
; JESUS-BARROS et al., 2015 JESUS-BARROS, C.R; ADAIME, R.; LIMA, A.L.; SANTOS, J.A. Ocorrência de Dasiops inedulis Steyskal (Diptera: Lonchaeidae) em maracujazeiro no Amapá. Macapá: Embrapa, 2015. (Comunicado técnico, 137). Disponível em: https://www.infoteca.cnptia.embrapa.br/handle/doc/1025251. Acesso em: 26 ago. 2022. ). This work corroborates the survey and identification of the passion fruit flower bud fly as the predominant D. inedulis species in P. edulis (GALINDO et al., 2014 GALINDO, M.Y.S.; ÁVILA, A.P.C.; RAVELO, E.E.E.; BROCHERO, H.L.M. Caracterización de daños de moscas del género Dasiops (Diptera: Lonchaeidae) en Passiflora spp. (Passifloraceae) cultivadas en Colombia. Revista Facultad Nacional de Agronomía Medellín, n.67, v.1, p.7151-62, 2014. Disponível em: https://www.scinapse.io/papers/1602537277 . Acesso em: 26 ago. 2022.
https://www.scinapse.io/papers/160253727...
; SALAZAR-MENDONÇA et al., 2019 SALAZAR-MENDONZA, P.A.; PERALTA-ARAGÓN, I.E.; MISAILIDIS, M.L.; ROMERO-RIVAS, L.C.; STRIKIS, P.C. Lance flies associated with sweet passion fruit and contributions to the knowledge on Lonchaeidae in Peru. Arquivos do Instituto Biológico, São Paulo, v.86, p.1-4, 2019. Disponível em: https://www.scielo.br/j/aib/a/BNqxKHy7HGptrLnztmDNbwz/?lang=en. Acesso em: 26 ago. 2022.
https://www.scielo.br/j/aib/a/BNqxKHy7HG...
). The distribution of this species of lonqueids is wide in the various countries that produce Passifloraceae, and it can become a pest of economic importance (STRIKIS et al., 2011 STRIKIS, P.C.; DEUS, E.G.; SILVA, R.A.; PEREIRA, J.D.B.; JESUS, C.R.; MARSARO JÚNIOR, A.L. Conhecimento sobre Lonchaeidae na Amazônia brasileira. In: SILVA, R.A.; LEMOS, W.P.; ZUCCHI, R.A. (ed.). Moscas-das-frutas na Amazônia brasileira: diversidade, hospedeiros e inimigos naturais. Macapá: Embrapa Amapá, 2011. p.205-16. ) as losses of up to 100% of production have been reported which was caused by the early abortion of flower buds in northern Brazil (LUNZ et al., 2006 LUNZ, A.M.; SOUZA, L.A.; LEMOS, W.P. Reconhecimento dos principais insetos-praga do maracujazeiro. Belém: Embrapa Amazônia Oriental, 2006. 36 p. Disponível em: https://www.infoteca.cnptia.embrapa.br/bitstream/doc/379352/1/Doc245.pdf. Acesso em: 26 ago. 2022. ).

Regarding the emerged parasitoids, the braconid U. anastrephae was the most abundant. It had been reported for the first time, the infesting larvae-pupae of D.inedulis, in Colombia, by Quintero et al.(2012) QUINTERO, E.M.; LÓPEZ, I.C.; KONDO, T. Manejo integrado de plagas como estratégia para el control de la mosca del botón floral del maracuyá Dasiops inedulis Steyskal (Diptera: Lonchaeidae). Corpoica – Ciencia y Tecnologia Agropecuária, Bogotá, n.13, v.1, p.31-40, 2012. Disponível em: https://www.redalyc.org/articulo.oa?id=449945032004. Acesso em: 26 ago. 2022.
https://www.redalyc.org/articulo.oa?id=4...
. Until then, this species was recorded only for other genera of Tephritoidea, such as Anastrepha, Ceratitis, and Tomoplagia (UCHÔA-FERNANDES et al., 2003 UCHÔA-FERNANDES, M.A.; OLIVEIRA, I.; MOLINA, R.M.S.; ZUCCHI, R.A. Biodiversity of Frugivorous Flies (Diptera: Tephritoidea) Captured in Citrus Groves, Mato Grosso do Sul, Brazil. Neotropical Entomology, Dordrecht, v.32, n.2, p.239-46, 2003. Disponível em: https://www.scielo.br/j/ne/a/3j9yWVNXCX4BPRMbr6qVmVk/?lang=en. Acesso em: 31 mar. 2023.
https://www.scielo.br/j/ne/a/3j9yWVNXCX4...
). Parasitoids of the genus Aganaspis (Figitidae) had already been reported in Colombia parasitizing D. inedulis pupae by Quintero et al. (2012) QUINTERO, E.M.; LÓPEZ, I.C.; KONDO, T. Manejo integrado de plagas como estratégia para el control de la mosca del botón floral del maracuyá Dasiops inedulis Steyskal (Diptera: Lonchaeidae). Corpoica – Ciencia y Tecnologia Agropecuária, Bogotá, n.13, v.1, p.31-40, 2012. Disponível em: https://www.redalyc.org/articulo.oa?id=449945032004. Acesso em: 26 ago. 2022.
https://www.redalyc.org/articulo.oa?id=4...
. The species A.pelleranoi was recorded for the first time for fly species of the genus Dasiops by Santamaría et al. (2016) SANTAMARÍA, M.; EBRATT, E.; CASTRO A.; BROCHERO, H.L. Hymenopterous parasitoids of Dasiops (Diptera: Lonchaeidae) infesting cultivated Passiflora spp. (Passifloraceae) in Cundinamarca and Boyaca, Colombia. Agronomia Colombiana, Bogotá, v.34, n.2, p.200-8, 2016. Disponível em: https://pdfs.semanticscholar.org/6556/639b55cf007c5afc3c60681e33c16f911752.pdf?_ga=2.13157879.1709105043.1661537569-39436722.1661537569. Acesso em: 26 ago. 2022. and was also recorded in the present study, which is the first report of this association in the country.

Furthermore, this parasitoid is also known to parasitize larvae-pupae of Neosilba sp., in addition to several species of the genus Anastrepha (GUIMARÃES et al., 2003 GUIMARÃES, J.A.; GALLARDO, F.E.; DIAZ, N.B.; ZUCCHI, R.A. Eucoilinae species (Hymenoptera: Cynipoidae: Figitidae) parasitoids of fruit-infesting dipterous larvae in Brazil. Zootaxa, Auckland, n.278, p.1-23, 2003. Disponível em: https://www.biotaxa.org/Zootaxa/article/view/zootaxa.278.1.1. Acesso em: 26 ago. 2022.
https://www.biotaxa.org/Zootaxa/article/...
).

The small number of parasitoids collected in the experimental area is likely to have been the result of the use of pesticides by farmers and by the type of crops, orchards, and vegetation adjacent to the experimental area.

According to Carrero et al. (2013) CARRERO, D.A.; MELO, D.; URIBE, S.; WYCKHUYS, K.A.G. Populations dynamics of Dasiops inedulis (Diptera: Lonchaeidae) and its biotic and abiotic mortality factors in Colombian sweet passionfruit orchards. Journal of Pest Science, Heidelberg, n.86, p.438-47, 2013. Disponível em: https://link.springer.com/article/10.1007/s10340-013-0487-9. Acesso em: 26 ago. 2022.
https://link.springer.com/article/10.100...
, the lack of parasitoids in their work was explained by the exacerbated use of pesticides in orchards in the experimental region. The authors still consider that the current management against pests needs to be reviewed. In line with this idea, Quintero et al. (2012) QUINTERO, E.M.; LÓPEZ, I.C.; KONDO, T. Manejo integrado de plagas como estratégia para el control de la mosca del botón floral del maracuyá Dasiops inedulis Steyskal (Diptera: Lonchaeidae). Corpoica – Ciencia y Tecnologia Agropecuária, Bogotá, n.13, v.1, p.31-40, 2012. Disponível em: https://www.redalyc.org/articulo.oa?id=449945032004. Acesso em: 26 ago. 2022.
https://www.redalyc.org/articulo.oa?id=4...
established a MIP for the population control of D. inedulis in Colombia. However, Bateman (1972) BATEMAN, M.A. The ecology of fruit flies. Annual Review of Entomology, Palo Alto, n.17, p.493-518, 1972. justifies the low occurrence of natural enemies in field experiments because most fruit fly parasitoids, under natural conditions, do not occur in sufficient density to interfere with infestation levels of fruit flies in commercial orchards.

According to Quintero et al. (2012) QUINTERO, E.M.; LÓPEZ, I.C.; KONDO, T. Manejo integrado de plagas como estratégia para el control de la mosca del botón floral del maracuyá Dasiops inedulis Steyskal (Diptera: Lonchaeidae). Corpoica – Ciencia y Tecnologia Agropecuária, Bogotá, n.13, v.1, p.31-40, 2012. Disponível em: https://www.redalyc.org/articulo.oa?id=449945032004. Acesso em: 26 ago. 2022.
https://www.redalyc.org/articulo.oa?id=4...
, there are records of parasitoid hymenopteran families Braconidae, Figitidae, and Pteromalidae parasitizing flies of the Lonchaeidae family. This parasitism index varies among the producing regions in Brazil, due to the environment, the time of collection, the host plant species and the fly to be parasitized (OVRUSKI et al., 2000 OVRUSKI, S.; ALUJA, M.; SIVINSKI, J.; WHARTON, R. Hymenopteran parasitoids on fruit-infesting Tephritidae (Diptera) in Latin America and the Southern United States: diversity, distribution, taxonomic status and their use in fruit fly biological control. Integrated Pest Management Reviews, Andover, v.5, p.81-107, 2000. Disponível em: https://www.academia.edu/8332208/Hymenopteran_parasitoids_on_fruit_infesting_Tephritidae_Diptera_in_Latin_America_and_the_southern_United_States_Diversity_distribution_taxonomic_status_and_their_use_in_fruit_fly_biological_control. Acesso em: 26 ago. 2022.
https://www.academia.edu/8332208/Hymenop...
).

Regarding the number of adults emerging from flower buds, two peaks were recorded in the 2017/2018 harvest (Figure 2) and a peak in the 2018/2019 harvest (Figure 3). For the 2017/2018 harvest, the value of Kendall’s Tau (τ) did not indicate a correlation between lonqueids emergence and precipitation (p = 0.33; τ = 0.06) and a poor correlation with average temperature ( p = 0.1; τ = 0.16). The same was observed for the second assessed harvest (2018/2019), where Kendall’s Tau value for data referring to precipitation (p = 0.93; τ = -0.09) and average temperature (p = 0. 99; τ = -0.14) indicated a non-correlation and a weak correlation.

Figure 2
Population fluctuation of lonqueids emerged from flower buds of sour passion fruit, 2017/2018 harvest, Sombrio, SC. A) Number of emerged lonqueids per collection date; B) weather parameters of the evaluation period (Source: Epagri, 2020).

Figure 3
Population fluctuation of lonqueids emerged from flower buds of sour passion fruit, 2018/19 harvest, Sombrio, SC. A) Number of emerged lonqueids collection date; B) weather parameters of the evaluation period (Source: Epagri, 2020).

In the 2018/2019 harvest, the highest numbers of lonqueids emergence were observed between March and May (Figure 3), which are the months following the highest number of flower buds and fruits produced, according to the evaluations of the reproductive structures carried out from September 2018 to May 2019 (Figure 4).

Figure 4
Average number of reproductive structures per plant recorded from September /2018 to March /2019, Sombrio, SC.

It can be seen through Kendall’s Tau test a strong and inversely proportional correlation between the emission of buds smaller than 2 cm and the emergence of lonqueids (p = 0.9; τ = -0.75) and a moderate and inversely proportional correlation between the emission of buds larger than 2.1 cm and the emergence of lonqueids (p = 0.9, τ = -0.47).

No correlation in terms of fruit emission (p = 0.8; τ = -0.24) was observed. Thus, it can be seen that the emergence peaks of lonqueids in November and February in the 2017/18 season and April in the 2018/19 season (Figures 2 and 3) are related to the emission peaks of flower buds (Figure 4).

The test also indicated a weak correlation between the mean temperature and the emission of flower buds smaller than 2 cm (p = 0.05; τ = 0.35) and a moderate one for buds larger than 2.1 cm (p = 0.005; τ = 0.56) and fruits (p = 0.002; τ = 0.63). For fruits, a moderate correlation was also observed between mean precipitation and its occurrence (p = 0.004; τ = 0.57). No correlation was found between precipitation and the emission of flower buds smaller than 2 cm (p = 0.7; τ = -0.13) and buds larger than 2.1 cm (p = 0.2; τ = 0, 17).

In the first evaluation carried out in this experiment, the plants had already shown the emission of floral buds (Figure 4). After two weeks, a peak in the production of buds larger than 2 cm was observed, with an increase in the emission of new buds also occurring during this period. The peak of emission of floral buds (up to 2 cm) occurred at the beginning of December 2018 and the peak of observation of the presence of large fruits occurred one month after the peak of floral buds, which was a period with the highest production over the crop’s vegetative cycle.

This period coincides with the well-known production of the first flowering of the passion fruit, also considered the one with the best quality and profitability for the region (PIEVA et al., 2017 PIEVA, D.C.; ELIAS, H.T.; GUGEL, J.T.; GOULART JÚNIOR, R. Relatório de mercado agrícola na Ceasa/SC. 2017. (Relatório, 6). Disponível em: http://docweb.epagri.sc.gov.br/website_cepa/Relatorio_Ceasa/Relatorio_Mercado_Agricola_Ceasa_Mai_2017_n6.pdf. Acesso em: 26 ago. 2022.
http://docweb.epagri.sc.gov.br/website_c...
).

Based on the supply of buds and fruits throughout the 2018/2019 harvest (Figure 4), it is possible to observe that peaks in the offer of floral buds are followed by peaks in the offer of fruits. In this harvest (Figure 2), only one peak of the emergence of lonqueids was observed, in April (Figure 3), at the end of the productive cycle of the crop, with no peaks of lonqueids at the beginning (November) and middle (February) of the productive cycle as observed in the 2017/18 harvest. Considering that the peaks of the emergence of lonqueids are associated with the peaks of emission of flower buds and that these peaks of the emergence of lonqueids had a weak correlation with the climatic assessed variables, other factors influenced the dynamics of the pest, such as the use of pesticides in the adjacent sites to the experimental area.

However, as emergence peaks of flower bud fly adults were observed from November to April (Figures 2 and 3) in both assessed harvests, and the variation in the months with the highest occurrence of the pest, we reinforce the importance of monitoring populations throughout the productive period.

When considering that the fruits produced during the first flowering of the passion fruit tree in the extreme south of Santa Catarina are those that generate the greatest income for producers in the region (PIEVA et al., 2017 PIEVA, D.C.; ELIAS, H.T.; GUGEL, J.T.; GOULART JÚNIOR, R. Relatório de mercado agrícola na Ceasa/SC. 2017. (Relatório, 6). Disponível em: http://docweb.epagri.sc.gov.br/website_cepa/Relatorio_Ceasa/Relatorio_Mercado_Agricola_Ceasa_Mai_2017_n6.pdf. Acesso em: 26 ago. 2022.
http://docweb.epagri.sc.gov.br/website_c...
), the monitoring and control of the pest must be focused on flower buds which will produce fruits in December and January (Figure 4), thus establishing a critical period beginning between November to December.

Throughout the entire crop cycle, three emission peaks of floral buds were observed (Figure 4). Not all flower buds produced at the beginning of the crop’s vegetative cycle corresponded to the fruit formation, given their lower peak. It is possible that some of the buds that did not set were aborted by factors of the plant’s physiology or could still be related to the occurrence of pests and diseases.

When considering that passion fruit is a plant that needs at least 11 hours of photoperiod to flower (JUNQUEIRA et al., 2001 JUNQUEIRA, N.T.V.; VERAS, M.C.M.; CHAVES, R. da C.; FIALHO, J. de F.; OLIVEIRA, J.A. de; MATOS, A.P. Manejo da floração do maracujazeiro. Brasília, DF: Embrapa/Cerrados, 2001. 3 p. (Recomendação técnica, 45). Disponível em: https://www.infoteca.cnptia.embrapa.br/infoteca/bitstream/doc/566463/1/rectec45.pdf. Acesso em: 26 ago. 2022. ), it was expected that fruit production would be directly affected by temperature. Furthermore, Cavichiolli et al. (2008 CAVICHIOLI, J.C.; RUGGIERO, C.; VOLPE, C.V. Caracterização físico-química de frutos de maracujazeiro-amarelo submetidos à iluminação artificial, irrigação e sombreamento. Revista Brasileira de Fruticultura, Jaboticabal, v.30, n.3, p. 649-56, 2008. Disponível em: https://repositorio.unesp.br/handle/11449/1504. Acesso em: 26 ago. 2022.
https://repositorio.unesp.br/handle/1144...
) demonstrated that artificial lighting, as a way to increase the photoperiod in unfavorable seasons, increased the average fruit weight, confirming the importance of temperature on plant productivity.

Based on the results of this work, it can be considered that buds larger than 2 cm are most sought after by the floral bud fly. In addition, the temperature seems to be a factor that influences both the occurrence of Dasiops in flower buds and their emission, although the correlations obtained in this experiment were considered moderate to weak. On the other hand, precipitation had no influence either on the population dynamics of Dasiops or on the emission of plant structures.

Conclusions

The floral bud fly prefers to oviposit on buds larger than 2 cm. The emergence peaks of lonqueids (November, February, and April) in the two assessed harvests are related to the emission peaks of flower buds. November and December are the most critical in case of population peaks of the pest in floral buds in orchards, and monitoring and controlling should be focused on during this period.

Precipitation does not influence the emergence peaks of lonqueids and the average temperature poorly explains these peaks.

The average temperature was a weak and moderate influence on the emission of flower buds. Average temperature and precipitation are the main factors that influence the production of sour passion fruit in southern Santa Catarina.

D. inedulis was the predominant species in flower buds, where Dasiops sp. 1, and Dasiops sp. 2, both in the process of identification and Neosilba certa were reported for the first time. Utetes anastrephae and Aganaspis pelleranoi are reported for the first time as parasitoids of larvae-pupae of the flower bud fly of sour passion fruit in Santa Catarina.

Acknowledgements

The authors would like to thank the PIBIC/ CNPQ/UNESC program for granting scholarships to undergraduate students who participated in the execution of this experiment.

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Data availability

Data citations

IBGE. Produção agrícola municipal: maracujá. Rio de Janeiro, 2021. Disponível em: https://sidra.ibge.gov.br/tabela/5457#resultado Acesso em: 03 abr. 2023.

Publication Dates

  • Publication in this collection
    30 Oct 2023
  • Date of issue
    2023

History

  • Received
    13 Sept 2022
  • Accepted
    23 June 2023
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