低温对不同虫态烟草甲的影响

The Effect of Low Temperature on Lasioderma serricorne (Fabricius)

利用低温处理方法,对不同虫态烟草甲进行处理。研究结果表明,各虫态烟草甲耐低温的顺序从高到低依次是:幼虫、成虫、卵。-20℃处理,各虫态烟草甲死亡率都为100%;-10℃低温条件下,处理1h以上,烟草甲卵和成虫全部死亡,处理72h以上,烟草甲幼虫全部死亡;5℃处理72h以上,烟草甲卵不再孵化,5℃处理20d不能使烟草甲幼虫和成虫完全致死,但影响幼虫化蛹和成虫产卵。各温度处理中烟草甲幼虫最终羽化率为0,成虫单雌产卵量为0。0℃,5℃卵最高孵化率均为41.67%。对照中幼虫最终羽化率为77%、卵最终孵化率为52%。

Studies were undertaken to establish the effects of low temperatures on the growth of cigarette beetle.The results showed that the larvae had the highest tolerance to low temperature,followed by adults and eggs.At the temperature of-20℃,the death rate of cigarette beetle of all life stages were 100%.At the temperature of-10℃,the eggs and adults were died by treated 1 h,and the larvae need 72 h.The eggs of cigarette beetle can not hatched by treated 72 h at 5℃.At the temperature of 5℃,the nymphosis of larvae and the eclosion of adults were affected,but can not be killed.At all of the temperatures tested,the final eclosion rate and the amount of spawned egg were all zero.The highest eclosion rate is 41.67%at 5℃and 0℃.In contrast,the final eclosion rate of larvae was 77%and the final hatching rate of egg was 52%.