Development of Chrysoperla externa fed in the larval stage with eggs of Bonagota cranaodes/Desenvolvimento de Chrysoperla externa alimentada na fase larval com ovos de Bonagota cranaodes
The paper aimed to conduct biological studies of the chrysopidae species most frequent in the Brazilian agroecosystems, Chrysoperla externa, in order to raise this species under laboratory conditions. The research was developed at the Entomology Laboratory of the Federal University of Santa Maria, w...
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Published in: | Ciência rural Vol. 41; no. 9; p. 1571 |
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Main Authors: | , , , , , |
Format: | Journal Article |
Language: | Spanish |
Published: |
Universidade Federal de Santa Maria
01-09-2011
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Subjects: | |
Online Access: | Get full text |
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Summary: | The paper aimed to conduct biological studies of the chrysopidae species most frequent in the Brazilian agroecosystems, Chrysoperla externa, in order to raise this species under laboratory conditions. The research was developed at the Entomology Laboratory of the Federal University of Santa Maria, where biological studies of immature and adult stages of C. externa were performed, feeding its larva with eggs of Bonagota cranaotes and adults with an artificial diet based on beer yeast and honey, in the 1:1 proportion. The embryonic period was determined using gel capsules and 2.5x8.5cm glass tubes. The adult insects were raised in PVC tubes of 10.0cm diameter and 23.0cm length, at the temperature of 25°C ± 2°C and 70 ± 10% relative humidity and 14 hour photophase. According to the results obtained, the embryonic period was of 4.0 days, with 89.2% of viability, the mean larval period for the 1st, 2nd and 3rd instars was of 3.7, 4.9 and 4.5 days, respectively. The mean period for pre-pupa and pupa was of 1.4 and 9.3 days, respectively, amounting to a mean developing cycle of 27.8 days. The width measures of the cephalic capsule showed that the Dyar's rule can applied to this case. Larva of Chrysoperla externa may be raised in eggs of Bonagota cranaodes under laboratory conditions. Key words: biological control, chysopidae, leaf-roller. Este trabalho teve por finalidade realizar estudos biologicos da especie de crisopideo de maior ocorrencia nos agroecossistemas brasileiros, Chrysoperla externa, a fim de viabilizar a criacao desta em condicoes de laboratorio. O trabalho foi desenvolvido no Laboratorio de Entomologia da Universidade Federal de Santa Maria, onde foi estudada a biologia das fases imatura e adulta de C. externa, alimentando suas larvas com ovos de Bonagota cranaodes e os adultos com dieta artificial a base de levedo de cerveja e mel na proporcao de 1:1. O periodo embrionario foi determinado utilizando capsulas de gelatina e tubos de vidro de 2,5x8,5cm e os insetos adultos foram criados em gaiolas de tubo de PVC com 10,0 cm de diametro e 23,0cm de comprimento em temperatura de 25 ± 2°C e 70 ± 10% de umidade relativa e fotofase de 14 horas. De acordo com os resultados obtidos, o periodo embrionario foi de 4,0 dias, com viabilidade de 89,2%. Para a fase larval, foi determinada uma duracao de 13,1 dias, sendo a duracao media para o 1o, 2- e 3 instares de 3,7; 4,9; e 4,5 dias, respectivamente. O periodo medio de pre-pupa e pupa foi de 1 , 4 e 9, 3 dias, respectivamente, perfazendo um ciclo de desenvolvimento medio de 27,8 dias. As medidas da largura da capsula cefalica mostraram que a regra de Dyar aplica-se nesse caso. Larvas de Chrysoperla externa podem ser criadas em ovos de Bonagota cranaodes em condicoes de laboratorio. Palavras-chave: controle biologico, crisopideos, lagarta-enroladeira. |
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ISSN: | 0103-8478 |