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Pentatomofauna associated with sunflower in Northern Paraná State, Brazil

Pentatomofauna associada ao girassol no Norte do Paraná, Brasil

Abstract

Realizou-se um levantamento das espécies de pentatomídeos associadas ao girassol (Helianthus annuus L.) na região de Londrina, norte do Paraná durante abril-maio de 1997. Seis espécies foram capturadas: Euschistus heros (F.), Piezodorus guildinii (West.), Acrosternum armigera (Stal), Nezara viridula (L.), Thyanta perditor (F.) e Thyanta sp. Observou-se ninfas de quatro espécies, exceção de P. guildinii e Thyanta sp. Foram coletadas posturas apenas de A. armigera.

Insecta; Hemiptera; Heteroptera; Helianthus annuus; percevejos


Insecta; Hemiptera; Heteroptera; Helianthus annuus; percevejos

SCIENTIFIC NOTE

Pentatomofauna associated with sunflower in Northern Paraná State, Brazil

Pentatomofauna associada ao girassol no Norte do Paraná, Brasil

Andréa B. MalaguidoI; Antônio R. PanizziII

IDepartamento de Zoologia, Universidade Federal do Paraná, Caixa postal 19.020, 81531-990, Curitiba, PR

IICentro Nacional de Pesquisa de Soja, Embrapa, Caixa postal 231, 86001-970, Londrina, PR

RESUMO

Realizou-se um levantamento das espécies de pentatomídeos associadas ao girassol (Helianthus annuus L.) na região de Londrina, norte do Paraná durante abril-maio de 1997. Seis espécies foram capturadas: Euschistus heros (F.), Piezodorus guildinii (West.), Acrosternum armigera (Stal), Nezara viridula (L.), Thyanta perditor (F.) e Thyanta sp. Observou-se ninfas de quatro espécies, exceção de P. guildinii e Thyanta sp. Foram coletadas posturas apenas de A. armigera.

Palavras-chave: Insecta, Hemiptera, Heteroptera, Helianthus annuus, percevejos.

Several species of stink bugs (Pentatomidae) have been reported on sunflower (Helianthus annuus L.) in many parts of the world, including Nigeria (Misari 1990), India (Nath & Sen 1977, Arya et al. 1995), Australia (Broadley 1978), South Africa (Annecke & Moran 1982), and USA (Lynch & Garner 1980, Hilgendorf & Goeden 1981), among others.

Sunflower is a relatively new crop in the Northern area of Paraná state, in Brazil. It has been introduced and cultivated in several areas of Brazil with potential to become an important crop (Castro et al. 1996). Not much has been done regarding to the insect fauna associated to this crop in Paraná state, except for the surveys conducted in the early-mid 80's (Villas Bôas et al. 1983, Villas Bôas & Moscardi 1985). Recently, we have observed several species of pentatomids on sunflowers plants in the Londrina area, northern Paraná state (latitude 23º11' S, longitude 51º, 11' W). Because of that a survey on the species of stink bugs colonizing sunflower in this area was conducted.

During April-May 1997, 10 nearly weekly samples of eggs, nymphs, and adults of pentatomids were taken on sunflowers plants. Each sample consisted of examining 40 plants selected at random from the R5 stage of development (full bloom - Schneiter & Miller 1981) up to physiological maturity (R9). The number of eggs, nymphs and adults of each species found were recorded in the field and the adults taken to the laboratory where they were killed, pinned, and kept in the insect collection of Embrapa Soja. The mean (± SEM) number of each species captured was calculated.

Six species of pentatomids were recorded on sunflower plants. Among them, the most abundant was the Neotropical brown stink bug, Euschistus heros (F.), followed by three other species, which were captured on similar numbers: the small green stink bug, Piezodorus guildinii (West.), Acrosternum armigera (Stal), and the southern green stink bug Nezara viridula (L.). Thyanta perditor (F.), and Thyanta sp. were observed in smaller numbers (Fig. 1). Nymphs of four species were recorded, excluding P. guildinii and Thyanta sp.; eggs masses were collected only from A. armigera, although egg masses of E. heros and of N. viridula have been observed on sunflower leaves on other occasions. It is worth noting that the pentatomid Edessa meditabunda (F.), which was found on sunflower on previous years in this area (Panizzi & Machado-Neto 1992), was not intercepted this time.


These results suggest that these pentatomids, most of them pests of soybean [Glycine max (L.) Merr.] in northern Paraná state, are in a process of gradual adaptation to sunflower. Their movement from soybean and other host plants to sunflower, particularly after soybean harvest in March, when no other crops are available in the field, indicates that sunflower plants are serving as a temporary host providing an extra source of nutrients, before the bugs decline their feeding and reproductive activities during the winter months that follow this period.

Acknowledgements

We thank Dr. Clara B. Hoffmann-Campo for revising this note. This is contribution number 13/98 of the Centro Nacional de Pesquisa de Soja - Embrapa, published with permission of the technical director. ABM received a scholarship from the Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) during the conduction of this study.

Literature Cited

Received 05/II/98. Accepted 09/VI/98.

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  • Arya, D.R., P.R. Yadav & H.V. Singh. 1995. Insect pest complex of sunflower in relation to crop phenology. Indian J. Entomol. 57: 141-145.
  • Broadley, R.H. 1978. Insect pests of sunflower. Queensland Agric. J. 104: 307-314.
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  • Nath, D.K. & B. Sen. 1977. Insect pests occurring on sunflower (Helianthus annuus L.) in West Bengal. Science and Culture 43: 180-181.
  • Panizzi, A.R. & E. Machado-Neto. 1992. Development of nymphs and feeding habits of nymphal and adult Edessa meditabunda (Heteroptera: Pentatomidae) on soybean and sunflower. Ann. Entomol. Soc. Am. 85: 477-481.
  • Schneiter, A.A. & J.F. Miller. 1981. Description of sunflower growth stages. Crop Science 21: 901-903.
  • Villas Bôas, G.L. & F. Moscardi. 1985. Levantamento dos insetos-pragas do girassol e seus inimigos naturais. EMBRAPA-CNPSo. Res. Pesq. Girassol 16: 9-12.
  • Villas Bôas, G.L., F. Moscardi & N.Y. Koga. 1983. Levantamento de insetos-pragas do girassol e seus inimigos naturais. EMBRAPA-CNPSo. Res. Pesq. Girassol p.16-17.

Publication Dates

  • Publication in this collection
    28 June 2006
  • Date of issue
    Sept 1998

History

  • Received
    05 Feb 1998
  • Accepted
    09 June 1998
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