Comparison of artificial diets for rearing Corcyra cephalonica (Stainton, 1865) (Lep., Pyralidae) for Trichogramma mass production

Abstract

The objective of this research was, based on biological studies, to determine and adequate diet for rearing Corcyra cephalonica (Stainton, 1865) in the laboratory so as to permit the rearing of this factitious host for Trichogramma mass production. The research was conducted at 25 +/- 1 degrees C, RH 60 +/- 10% and photophase of 14 hours. Six artificial diets were compared: a) whole wheat flour (48.5%), ground rice (48.5%) and sugar (3%); b) ground rice (97%) and sugar (3%); c) whole wheat flour (48.5%), rice flour (48.5%) an sugar (3%); d) whole wheat flour (97%) and yeast (3%); e) wheat germ (97%) and yeast (3%); f) rice bran (94%), sugar (3%) and yeast (3%); f) rice bran (94%), sugar (3%) and yeast (3%). All of the diets studied permitted the development of C. cephalonica although the diets with wheat germ and yeast and that consisting of rice bran, sugar and yeast proved to be the most adequate for rearing the moth. These diets reduced the total (egg-adult) cycle, shortened the egg laying period, and produced heavier adults. Studies on the fertility life tables showed that higher net reproduction rates (Ro) and finite ratio of increase (lambda) were obtained from adults reared on these diets.

Capacidade de parasitismo de Trichogramma pratissolii Querino & Zucchi (Hymenoptera: Trichogrammatidae) em hospedeiros alternativos, sob diferentes temperaturas

“…A metodologia empregada na criação de A. kuehniella e C. cephalonica foi adaptada de Parra (1997), utilizando uma dieta à base de farinha de trigo integral (60%) e de milho (37%) e levedura de cerveja (3%) para A. kuehniella e uma dieta à base de farelo de arroz (94%), levedura de cerveja (3%) e açúcar (3%) para C. cephalonica (Bernardi et al 2000).…”

Biological studies on Bracon brevicornis (Hymenoptera: Braconidae) reared on different host larvae

“…C-Corcyra cephalonica (The rice moth) C. cephalonica moths were obtained from naturally infested grains stored in a local warehouse in Cairo Governorate. The collected moths held in 500 ml beakers half filled with wheat germ (97%) and yeast (3%) for 24 h for oviposition (Bernardi et al, 2000).…”

Tabela de vida de fertilidade de três espécies neotropicais de Trichogrammatidae em ovos de hospedeiros alternativos como critério de seleção hospedeira

“…As populações dos parasitóides estudados foram mantidas em seus hospedeiros alternativos de acordo com Parra (1997), sendo A. kuehniella criada em dieta à base de farinha de trigo integral (97%) e levedura de cerveja (3%) (Parra 1997), C. cephalonica em dieta à base de germe de trigo (97%) e levedura de cerveja (3%) (Bernardi et al 2000) e S. cerealella em grãos de trigo (Haji et al 2002).…”