New host records for species of Anastrepha ( Diptera : Tephritidae ) in the state of Amazonas , Brazil

Arq. Inst. Biol., v.85, 1-3, e0842017, 2018 RESUMO: Esse é o primeiro registro, para o estado do Amazonas, da ocorrência de Anastrepha striata em frutos de abiu (Pouteria caimito, Sapotaceae) e de carambola (Averrhoa carambola, Oxalidaceae). As associações entre A. striata e Inga fagifolia (Fabaceae), A. striata e Passiflora nitida (Passifloraceae) e Anastrepha distincta e P. nitida são inéditas para o Brasil.

In Brazil, the fruit flies of the genus Anastrepha Schiner, 1868 (Diptera: Tephritidae) are very diverse and widely distributed, representing one of the main pests of fruticulture (MARSARO-JÚNIOR et al., 2013;CAMARGOS et al., 2015).In the Brazilian Amazon there are 78 known species of Anastrepha, with 42 recorded for the state of Amazonas, Brazil (ADAIME et al., 2016a).Intensive surveys done on native and exotic fruits have led to new fruit fly/host associations (DUTRA et al., 2013;ADAIME et al., 2016b), however, there is still a knowledge gap in the Brazilian Amazon region, which this study aims to fill.
In this context, the species Anatrepha striata Schiner 1868 and Anastrepha distincta Greene 1934 are highlighted for their constant occurrence in regional fruits.Anastrepha striata is a polyphagous species, very abundant and broadly distributed in the Amazon region, where it is a key pest species.It has been recorded on 31 plant species (ADAIME et al., 2014) and prefers fruits of the family Myrtaceae, especially guava (Psidium guajava) (ADAIME et al., 2016a).Currently, for the state of Amazonas, A. striata is associated to six hosts from two botanical families (Table 1).
Anastrepha distincta is recorded for 17 host species and shows a preference towards fruits of the family Fabaceae, especially the ice-cream-bean (Inga edulis).In the state of Amazonas, A. distincta is associated to six hosts from four botanical families (Table 1).
The state of Amazonas, in 2016, was the third largest producer of guava for commercialization in the North region of Brazil (IBGE, 2016).Furthermore, besides the economic importance of the two species of Tephritidae that damage and affect the commercialization of these fruits, guava is commonly consumed in natura in the Amazonian region, often planted in urban and rural backyards (SEMEDO; BARBOSA, 2007;ALMEIDA;GAMA, 2014).
All entomological material studied was collected in the municipality of Benjamin Constant (4º21'S; 70º2'W), mesoregion of the upper Solimões river, southwest in the state of Amazonas, Brazil.Abiu fruits (Pouteria caimito) were collected in the month of November/ 2008 and 2009, ingá-mirim (Inga fagifolia) and star fruit (Averrhoa carambola) were collected in 2009, and the bell apple (Passiflora nitida) fruits in May/2009 and August/2017.To obtain the fly adults, the fruits were kept in plastic bags and taken to the laboratory, where they were placed in plastic containers, with a layer of moist sand, and then covered with a screen cloth (ALMEIDA et al., 1998).After adult emergence, the specimens were kept for 24 hours until wing markings settled and then transferred to tubes with 70% EtOH.Sexes were distinguished based on the presence/ absence of the ovipositor.Species were identified based on morphological characteristics of the apex of the aculeus on the ovipositor, under stereomicroscope, and using the identification key to species of fruit flies recorded for Brazil (ZUCCHI, 2000).Specimens were deposited in the insect collection of the Laboratório de Entomologia e Acarologia Agrícola of the Faculdade de Ciências Agrárias/Universidade Federal do Amazonas -LEA/ FCA/UFAM, in Manaus, state of Amazonas, Brazil.
Table 2 shows the first records, for the state of Amazonas, of A. striata attacking fruits of abiu (P.caimito, Sapotaceae) and star fruit (A.carambola, Oxalidaceae), and the first

Table 1 .
Hosts of A. striata and A. distincta in the state of Amazonas.

Table 2 .
RIBEIRO (2005) andALMEIDA et al. (2009)nd host plants in Benjamin Constant, upper Solimões river, state of Amazonas, Brazil.Brazilian records of A. striata attacking bell apple fruits (Passiflora nitida, Passifloraceae) and ingá-mirim (Inga fagifolia, Fabaceae).With these new records, A. striata now has eight known hosts in the state of Amazonas and 33 in Brazil.Furthermore, Table 2 also shows the first association between A. distincta and bell apple fruits (P.nitida, Passifloraceae) for the state of Amazonas and Brazil; until now the only known association of the fruit was with Anastrepha curitisStone, 1942.With this new record, A. distincta now has seven known hosts in the state of Amazonas and 18 in Brazil.Most fruit fly studies in the state of Amazonas are concentrated in the metropolitan region of the city of Manaus.In the upper Solimões region, A. striata was reported byRONCHI-TELES (2000),RIBEIRO (2005) andALMEIDA et al. (2009).A. distincta was reported byRIBEIRO (2005), however, without any host association.These new records highlight the need to increase surveys of Tephritidae fauna in all Amazonian sub-regions.
* First record for the state of Amazonas; ** First record for Brazil.