Effects of Photoperiod and Temperature on Development and Overwintering of Spodoptera litura F. : Lepidoptera : Noctuidae

概要

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Development at 20°and 25℃ in the larvae and pupae of Spodoptera litura was not affected by photoperiod within a range from LD 10 : 14 to LD 16 : 8. The adults grown at 20°or 25℃ under different photoperiods mated and produced eggs without interruption. The eggs also hatched in a short period irrespective of the photoperiod. When individuals grown at 20°or 25℃ under different photoperiods were abruptly exposed to temperatures lower than 10℃ at different developmental stages for certain periods, they suffered more or less high mortality even in an exposure to 10℃ for 10 days, but a few could withstand an exposure to -2℃ for 1 day. When young larvae grown at 25℃ were exposed to temperature conditions declining step by step from 20°to 4°or -2℃ and then rising also step by step to 25℃, some survived and completed development, taking 60-70 days. Based on these results, the possibility of overwintering of this insect in different regions of Japan was discussed.
日本応用動物昆虫学会の論文
1976-09-25