Estimation of number of annual generations using effective heat unit of development for the rice bug, Leptocorisa chinensis (Dallas)(Hemiptera : Alydidae)

概要

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We investigated the effects of a range of constant temperatures (18-30℃) on the development of eggs, nymphs and the pre-oviposition period of adult females in Leptocorisa chinensis (Dallas). The duration of all stages decreased as the temperature increased from 18 to 30℃. Developmental thresholds of 8.1, 10.1 and 9.6℃ were estimated for the eggs, nymphs and pre-oviposition period, respectively. Thermal constants of 147 and 370 d-degrees above thresholds of 8.1 and 10.1℃ were required for the development of the eggs and nymphs, respectively. The pre-oviposition period required 256 d-degrees above the developmental threshold of 9.6℃. After placing individuals collected in November and February in an incubator in the laboratory, 469.7 d-degrees above 9.6℃, a threshold for nondiapause female adults that was assumed to be equal to that of diapause female adults, were estimated to be required for the pre-oviposition period of individuals that had overwintered. The present results were useful to predict the field population phenology of L. chinensis in Hyogo Prefecture.
日本応用動物昆虫学会の論文
2005-11-25