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O pulgao, Brevicoryne brassicae (L.), e uma das principais pragas da cultura da couve. A necessidade de controle de insetos-pragas de forma racional e sustentavel tem gerado a busca de medidas efetivas de controle. Objetivou-se estudar a capacidade predatoria e a resposta funcional da fase jovem de Ceraeochrysa caligata (Banks) alimentada com o pulgao Brevicoryne Brassicae (L.), usando ninfas de segundo e terceiro instares. Foram utilizadas cinco densidades de presas, com cinco repeticoes com dois individuos por repeticao. O Consumo aumentou proporcionalmente em funcao do estadio de desenvolvimento da larva, sendo significativamente maior no terceiro instar, representando acima de 75% do total. Os consumos medios diario e totais foram de 4,2 e 25,6; 10,2 e 70,2; 38,6 e 549,0 pulgoes, para os tres instares, respectivamente. Observou para a fase larval 23,4 e 644,8 pulgoes. Constatou se duracao media de 5,8; 6,7; 13,5 e de 26,0 dias para o primeiro, segundo e terceiro instares e fase larval, respectivamente. Observou se para os tres instares e fase larval, um maior consumo em funcao do aumento da densidade de presas. A duracao obtida para o primeiro e terceiro instares e fase larval, um maior consumo em funcao do aumento da disponibilidade de presas. Functional response and predatory ability of the larval stage of Ceraeochrysa caligata fed Brevicoryne brassicae ABSTRACT - The aphid, Brevicoryne brassicae (L.), is a major pest of cabbage culture. The need for insect pest control in a rational and sustainable manner has generated the search for effective control measures. The objective was to study the predatory capacity and the functional response of the young phase Ceraeochrysa caligata (Banks) fed with the aphid Brevicoryne brassicae (L.), using nymphs of second and third instars. Five prey densities were used, with five replicates with two individuals per replicate. Consumption increased in proportion to the larval stage of development and was significantly higher in the third instar, representing over 75% of the total. The daily and total average intake were 4.2 and 25.6; 10.2 and 70.2; Aphids 549.0 and 38.6 for the three instars, respectively. Observed for the larval stage 23.4 and 644.8 aphids. Found a mean duration of 5.8; 6.7; 13.5 and 26.0 days for the first, second and third instar and larval stage, respectively. Observed to the three instars and larval stage, a higher consumption due to the increase in prey density. The duration obtained for the first and third instar larval stage and a higher consumption due to the increased availability of prey.

Resposta funcional e capacidade predatória da fase larval de Ceraeochrysa caligata alimentada com Brevicoryne Brassicae