Xie Daosong, Luo Lizhi, Sappington Thomas W, Jiang Xingfu, Zhang Lei
State Key Laboratory for Biology of Plant Diseases and Insect Pests; Institute of Plant Protection, Chinese Academy of Agricultural Sciences. Yuanmingyuan West Road, Beijing 100193, China.
Environ Entomol. 2012 Oct;41(5):1199-207. doi: 10.1603/EN11068.
The beet webworm, Loxostege sticticalis (L.) (Lepidoptera: Pyralidae), uses both diapause and migration as life history strategies. To determine the role of diapause plays in the population dynamics of L. sticticalis, the reproductive and flight potentials of adults originating from diapause and nondiapause larvae were investigated under controlled laboratory conditions. Preoviposition period, lifetime fecundity, and daily egg production of females originating from diapause larvae were not significantly different from those originating from nondiapause larvae, showing that diapause has no significant effect on reproductive capacity when adults are provided with an adequate carbohydrate source. However, females that developed from diapause larvae lived significantly longer than those from nondiapause larvae. Flight capacity, including flight duration, distance and velocity of 3-d-old adults were all significantly greater in adults originating from diapause larvae than those from nondiapause larvae. L. sticticalis adults developing from diapause larvae tended to have more extreme values of longest flight duration and furthest flight distance than those from nondiapause larvae. Together, these results suggest that long-distance flight potential of L. sticticalis is greater after larval diapause than after direct development to adulthood. However, there were no significant differences between sexes within the two categories of moths in terms of total flight duration, total flight distance, flight velocity, and longest flight duration.
草地螟（Loxostege sticticalis (L.)，鳞翅目：螟蛾科）采用滞育和迁飞作为生活史策略。为了确定滞育在草地螟种群动态中的作用，在可控的实验室条件下，对源自滞育幼虫和非滞育幼虫的成虫的繁殖和飞行潜能进行了研究。源自滞育幼虫的雌虫的产卵前期、终生繁殖力和日产卵量与源自非滞育幼虫的雌虫相比无显著差异，这表明当为成虫提供充足的碳水化合物来源时，滞育对繁殖能力无显著影响。然而，由滞育幼虫发育而来的雌虫比由非滞育幼虫发育而来的雌虫寿命显著更长。3日龄成虫的飞行能力，包括飞行持续时间、距离和速度，源自滞育幼虫的成虫均显著高于源自非滞育幼虫的成虫。与源自非滞育幼虫的成虫相比，由滞育幼虫发育而来的草地螟成虫往往具有更长的最长飞行持续时间和更远的飞行距离的极端值。综合来看，这些结果表明，幼虫滞育后的草地螟长距离飞行潜能比直接发育至成虫后的更大。然而，在两类蛾子中，雌雄蛾在总飞行持续时间、总飞行距离、飞行速度和最长飞行持续时间方面均无显著差异。
