State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, 100193, China.
State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, 100193, China.
J Therm Biol. 2021 Aug;100:103066. doi: 10.1016/j.jtherbio.2021.103066. Epub 2021 Aug 2.
In Huang-Huai-Hai Summer Corn Region of China, brief periods of high summer temperatures have been reported with increasing frequency in recent years. Athetis lepigone is a cosmopolitan insect which causes severe damage on summer corn seedlings. To understand how high summer temperatures may affect the population dynamics of A. lepigone, we exposed different developmental stages (1, 2 and 4-day old eggs; 1, 6, 12 and 18-day old larvae; 1, 3 and 6-day old pupae; and 1 and 2-day old female and male adults) to 41 °C for periods of various length (0.5, 1, 2, 4 and 6 h): The rearing temperature (constant 26 °C) was used as control. After heat treatment, all individuals were transferred to a 26 °C climate chamber for further development. The effects on immediate survival, maturation success to adulthood, and female fecundity were studied. Eggs, young larvae, late pupae and newly emerged adults had relatively higher immediate survival rates than the other experimental groups. Heat treatment at the egg and larval stages had no impact on development to adulthood and on female fecundity, while it significantly reduced the survival rate of larvae but not of eggs. Brief exposure to high temperature during the early pupal stage and as adults depressed female fecundity whereas exposure during the late pupal stage had no effect.
在中国黄淮海夏玉米区,近年来频繁报道夏季高温期短暂。舞毒蛾是一种世界性昆虫,会对夏玉米幼苗造成严重损害。为了了解高温天气如何影响舞毒蛾的种群动态,我们将不同发育阶段(1、2 和 4 日龄卵;1、6、12 和 18 日龄幼虫;1、3 和 6 日龄蛹;1 日龄和 2 日龄雌成虫和雄成虫)暴露于 41°C 下不同时长(0.5、1、2、4 和 6 小时):以 26°C 的饲养温度(恒温)作为对照。热处理后,所有个体均转移至 26°C 气候室中进一步发育。研究了对即时存活率、成虫成熟成功率和雌性繁殖力的影响。卵、幼龄幼虫、晚期蛹和新羽化的成虫的即时存活率相对较高。在卵期和幼虫期进行热处理对成虫发育和雌性繁殖力没有影响,但显著降低了幼虫的存活率,但对卵没有影响。在早期蛹期和成虫期短暂暴露于高温会降低雌性繁殖力,而在晚期蛹期暴露则没有影响。