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- W2332287641 abstract "The green lacewings (Chrysopidae) have been reported in natural ecosystems as well in agroecosystems, inter- cropping or monocropping. However, the knowledge on their behavior on different agroecosystems is scarce. The present work aimed to determine the diversity of green lacewing species and to evaluate the influence of different agricultural crops, as well as climate factors, on the abundance of these insects in an agroecologically-based organic production system. The study was conducted from September 2008 to August 2009, by per- forming weekly sampling of Chrysopidae adults in areas of the Integrated Production Agroecological System (SIPA) in Seropedica (RJ), each with one type of cropping system (corn- -mucuna rotation/vegetable crops; shaded coffees and sugar cane/brachiaria pasture rotation). A total of 424 adult speci- mens were collected, belonging to three species: Chrysoperla externa (98.1%), Ceraeochrysa cubana (1.7%) and Ceraeochrysa paraguaria (0.2%). There were no differences on the number of green lacewing adults collected in the crops, although the correlation analysis showed that the crop rotations with gras- ses favor their abundance. The abundance of green lacewings was also influenced by the climate conditions only in the sys- tem of shaded coffees, being negatively correlated with mean air temperature and accumulated rainfall. resumo: Os insetos predadores da familia Chrysopidae tem sido relatados tanto em ecossistemas naturais como nos agroecossistemas, sejam eles cultivos consorciados ou monocultivos. Porem, sao escassas as informacoes sobre o comportamento das populacoes desses insetos nos agroecossistemas diversificados, como aqueles de base agroecolo- gica. O presente trabalho teve o objetivo de determinar a riqueza de especies de crisopideos e avaliar a influencia de diferentes cultivos agri- colas, assim como de fatores climaticos na abundância desses insetos em sistema de producao orgânica diversificada. O estudo foi condu- zido de setembro de 2008 a agosto de 2009, por meio de amostragens semanais de adultos de Chrysopidae em areas do Sistema Integrado de Producao Agroecologica, em Seropedica (RJ), cada qual com um tipo de sistema de cultivo (rotacao milho-mucuna/olericolas, cafeei- ros sombreados e rotacao cana-de-acucar/pastagem de braquiaria). Um total de 424 especimes de crisopideos foi coletado, sendo dis- tribuidos em tres especies: Chrysoperla externa (98,1%), Ceraeochrysa cubana (1,7%) e Ceraeochrysa paraguaria (0,2%). Nao houve dife- renca no numero de adultos coletados em funcao dos diferentes cul- tivos, embora a analise de correlacao evidencie que as rotacoes com poaceas favorecam o aumento da sua abundância. A abundância dos crisopideos foi influenciada pelo clima apenas no sistema de cafeeiros sombreados, sendo correlacionada negativamente com a temperatura media do ar e a com a precipitacao pluvial acumulada. Palavras-chave: Neuroptera; Chrysopidae; dinâmica populacional; manejo do habitat; fatores abioticos." @default.
- W2332287641 created "2016-06-24" @default.
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- W2332287641 date "2014-01-01" @default.
- W2332287641 modified "2023-09-27" @default.
- W2332287641 title "Influência de diferentes cultivos e fatores climáticos na ocorrência de crisopídeos em sistema agroecológico Influence of different crops and climate factors on the occurrence of green lacewings in agroecological system" @default.
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