Desenvolvimento pós-embrionário de Ceraeochrysa cincta (Schneider, 1851) (Neuroptera: Chrysopidae) alimentada com ovos de Diatraea saccharallis (Fabricius, 1794) (Lepidoptera: Crambidae)

Abstract

ResumoOs crisopídeos são importantes predadores encontrados associados a diversos artrópodes-praga em diversos agroecossistemas. Para a criação massal desses predadores são utilizados tradicionalmente ovos de Sitotroga cerealella e de Anagasta kuehniella. Outros alimentos podem ser utilizados em substituição aos tradicionais, mas pouco se conhece sobre a biologia de crisopídeos e outros alimentos alternativos. Assim, este trabalho objetivou verificar o efeito de diferentes dietas sobre o desenvolvimento pós-embrionário dessa espécie em laboratório. Após a individualização em tubos de vidro, cada larva foi alimentada com ovos de S. cerealella e Diatraea saccharallis. Avaliou-se a duração, o peso e a viabilidade das larvas em cada ínstar, a duração o peso e viabilidade das fases de pré-pupa e pupa e a duração do período pós-embrionário. Adotou-se o delineamento inteiramente casualizado, com dez repetições por tratamento, cada uma constituída por cinco ovos ou larvas de C. cincta. As larvas foram pesadas 48 horas após a eclosão e 48 horas após cada ecdise, e as pré-pupas e pupas, 48 horas após iniciarem esses estágios Não houve interferência do tipo de alimento fornecido sobre os parâmetros avaliados. Desta forma, ovos de D. saccharallis podem ser utilizados para alimentação de C. cincta. Palavras-chave: Crisopídeo, alimentação larval, controle biológico AbstractThe lacewings (Ceraeochrysa cincta) are important predators found associated to many pests in several agroecosystems. Eggs of Sitotroga cerealella and Anagasta kuehniella are used traditionally for massal rearing of these predators. Other foods can be used in substitution to the traditional ones, but little is known about the biology of lacewings and other alternative foods. So, this work was carried out to evaluate the effect of different diets on the post-embryonic development of C. cincta in laboratory. After been individualized in glass tubes, each larva was fed with S. cereallella and Diatraea saccharallis. It was evaluated the larvae duration, weight and viability in each instar, the duration, weight and viability of the pupa and pre-pupa stages and the duration of the post-embryonic period. It was adopted a completely randomized design with ten replications per treatment, each consisting of five eggs or larvae of C. cincta. Larvae were weighed 48 hours after hatching and 48 hours after each molt, and pre-pupae and pupae, 48 hours after starting these stages. There was no effect of the kind of food provided on the parameters evaluated. Therefore, D. saccharallis eggs can be used to feed C. cincta.

Biological aspects and predation behavior of Ceraeochrysa cubana against Spodoptera frugiperda

“…The highest values of viability of the larval phase are close to those verified by other authors when providing S. cerealella eggs to chrysopodes (Pessoa et al, 2010), with values ranging from 95 to 100%, which emphasizes the nutritional quality of lepidopteran eggs in the feeding of C. cubana larvae. Thus, the survival of the predatory insect, especially when it is generalist, can vary according to the prey species and the variation of prey consumed.…”

Interactions between Fungal-Infected Helicoverpa armigera and the Predator Chrysoperla externa

“…The efficacy of entomopathogenic fungi depends on their high virulence, in regard to arthropod pests, as well as on their selectivity and low virulence toward non-target insects [25]. Studies in Brazil have demonstrated the compatibility of fungal and lacewing species [26,27,28,29], and Chrysopidae have also been demonstrated as effective consumers of lepidopteran eggs [30,31,32,33], including those of H. armigera [34]. However, there is still much to learn about the effect of entomopathogenic fungi on the green lacewing, especially regarding its consumption of infected prey.…”