Plantas favoráveis a agentes de controle biológico

• Ano de defesa: 2007
• Autor(a) principal: Rosado, Maria da Consolação
• Orientador(a): Pallini Filho, ângelo
• Banca de defesa: Vilela, Evaldo Ferreira , Alvarenga, Antônio de Pádua
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Viçosa
• Programa de Pós-Graduação: Mestrado em Entomologia
• Departamento: Ciência entomológica; Tecnologia entomológica
• País: BR
• Palavras-chave em Português: Chrusoperia externa; Parasitóide; Café; Controle biológico; Leucoptera coffeella
• Palavras-chave em Inglês: Chrysoperla externa; Parasitoids; Coffee; Biological control; Leucoptera coffeella
• Área do conhecimento CNPq: CNPQ::CIENCIAS AGRARIAS::AGRONOMIA::FITOSSANIDADE::ENTOMOLOGIA AGRICOLA
• Link de acesso: http://locus.ufv.br/handle/123456789/4011

The sustainable management of pests is one of the challenges of modern agriculture. One possibility to reduce pest attack on crops is to enhance the abundance and to increase the effectiveness of natural enemies via diversification of crop area with plants that provide extra food source for predators and parasitoids. The objective of this thesis is to study the suitability of food produced by plants to natural enemies. In Chapter I, the suitability of nectar produced by buckwheat and by castor bean, plants with potential use in agroecossystem diversification, was evaluated as food source for the generalist predador Chrysoperla externa. The survival of larvae and adults of C. externa was higher when they fed on buckwheat floral nectar and on castor bean extrafloral nectar, than when they had no access to these nectars. In Chapter II, a combination of a carbohydrate (buckwheat nectar) and a protein food (sunn hemp pollen) was evaluated for survival and reproduction of C. externa. The addition of sunn hemp pollen to buckwheat nectar diet increased C. externa survival. The reproductive success of C. externa was similar when adult females fed only sunn hemp pollen and when buckwheat nectar was added to the pollen diet. Having found that buckwheat nectar is suitable for a generalist predator, I continue investigating its use by other members of the arthrropod food web preseny in coffee agroecosystems. Thus, in Chapter III, the use of buckwheat nectar by an important coffee pest, the coffee leaf miner Leucoptera coffeella and by its parasitoid Mirax sp. was evaluated. Survival of both, pest and parasitoid, was increased in the presence of buckwheat nectar. However, feeding on buckwheat nectar decreased its reproductive success. Together, these results show the potential of buckwheat, castor bean and sunn hemp for use in biological conservation control, especially in coffee agroecosystems.