Effects of parental exposure to high temperature on offspring performance in the cotton bollworm, Helicoverpa armigera(Hubner)(Lepidoptera: Noctuidae) : adaptive significance of the summer diapause

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Summer diapause in the cotton bollworm, Helicoverpa armigera (Hubner), is prolongation of the pupal stage, particularly in males, induced by high temperatures. The effects of exposing a parental generation to temperatures of 33 to 39℃ on the development, survivorship, longevity and fecundity of their offspring were determined in the laboratory. Three groups of offspring were examined : A, the progeny of control female moths reared as larvae at 27℃ mated to male moths that had undergone summer diapause when exposed to high temperature ; B, the progeny of control female moths mated to males that had not undergone summer diapause after exposure to high temperature ; C, the progeny of control females mated to control males reared at 27℃. The developmental times of the immature stages were significantly different between groups. The survival rate in the immature stages varied significantly from 69.8% (Group C) to 34.7% (Group B). The average number of eggs produced per female and the longevity of females and males were not significantly different. The indices of population increase of Groups C, A and B were 286.2, 256.8 and 145.0, respectively. These results indicate that Group A offspring had physiological advantages, such as survival and population increase, compared to Group B offspring. The adaptive significance of summer diapause in the cotton bollworm is discussed in relation to the performance of offspring.
日本応用動物昆虫学会の論文
2004-08-25

Effects of parental exposure to high temperature on offspring performance in the cotton bollworm, Helicoverpa armigera(Hubner)(Lepidoptera: Noctuidae) : adaptive significance of the summer diapause

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