Scientia Agricola (2002) 59, 191-196

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Edson Luiz Lopes Baldin, Antonio Cesar Caetano and Fernando Mesquita Lara (2002)
Atração e desenvolvimento de Leptoglossus gonagra (Fabr.) (Hemiptera: Coreidae) em cultivares de abóbora e moranga
[Attraction and development of Leptoglossus gonagra (Fabr.) (Hemiptera: Coreidae) in squash and pumpkin cultivars]
Scientia Agricola 59 (1), 191-196
Abstract: Cucurbitaceae plants are seriously damaged by attack of insects and the damages are present from germination to harvest, in all parts of the plants. Among sucking insects attacking squash (Cucurbita moschata) and pumpkin (C. maxima), the nymphs and adults of Leptoglossus gonagra (Fabr.) (Hemiptera: Coreidae) are considered as one of the main pests, sucking leaves, branches and fruits, causing necrosis and reducing the yield. To compare the attractivity of seedlings of squash and pumpkin cultivars in respect to adults of this insect, and the effects of these plants on the biology of the nymphs, assays were carried out under laboratory conditions. For the attractivity test, the BRA015113 squash genotype was the least attractive as compared to the Exposição pumpkin genotype, while BRA003531 was preferred. All the genotypes caused 100% of mortality of the nymphs, indicating the presence of antibiotic components, harmful to the biological development of L. gonagra.

As plantas da família Cucurbitaceae são seriamente prejudicadas pelo ataque de insetos, sendo que os danos ocorrem desde a germinação até a colheita e podem ser observados em todas as partes da planta. Dentre os insetos sugadores que atacam a abóbora (Cucurbita moschata) e a moranga (C. maxima), as formas jovens e adultas do percevejo Leptoglossus gonagra (Fabr.) (Hemiptera: Coreidae) merecem destaque por sugarem a seiva das folhas, ramos e frutos novos, nos quais causam necroses, reduzindo a produção. Visando comparar a atratividade de plântulas de cultivares de abóbora e moranga a adultos deste percevejo e os efeitos desses materiais sobre a biologia de ninfas dessa espécie, realizaram-se ensaios sob condições de laboratório. Em teste de atratividade, o cultivar de abóbora BRA015113 destacou-se como o menos atrativo em relação ao cultivar de moranga Exposição, enquanto que o cultivar de abóbora BRA003531 foi o mais atrativo. Todos os cultivares provocaram 100% de mortalidade das ninfas, indicando a presença de componentes antibióticos, adversos ao desenvolvimento de L. gonagra.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: Portuguese)
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Research topic(s) for pests/diseases/weeds:
general biology - morphology - evolution
resistance/tolerance/defence of host


Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.


Leptoglossus gonagra Squash/pumpkin (Cucurbita) Brazil (south)