麦红吸浆虫在不同滞育温度和时间条件下羽化率的初步研究

为了探索麦红吸浆虫的最佳滞育温度和时间,模拟田间温度在室内进行麦红吸浆虫滞育羽化研究。结果表明:麦红吸浆虫在一次滞育时,分别于4、6、8、9、10、11℃下滞育60、75、90、105、120d均能出土羽化,其中在4℃下滞育75d一次羽化率最高,为31.67%;二次滞育时,有些温度下不能出土羽化,其中在8℃下滞育120d羽化率最高,为8.00%;对于2次累积滞育,在4℃下滞育75d的出土羽化率最高,为33.50%;2次滞育羽化后剩余活茧率均较低,最高也仅为4.00%;土中滞育的麦红吸浆虫死亡率均在60%以上,最高可达96.17%。

Preliminary Study on Emergence Rate of Sitodiplosis mosellana under Different Temperature and Time

In order to explore the optimal diapause time and temperature of Sitodiplosis mosellana,its diapause and emergence was studied indoors simulating field temperature.Results showed that for the first diapause,Sitodiplosis mosellana could achieve emergence under 4 ℃,6 ℃,8 ℃,9 ℃,10 ℃,11 ℃ for 60 days,75 days,90 days,105 days,120 days,respectively.The highest emergence rate of 31.67% occurred under 4 ℃ for 75 days.For the secondary diapause,Sitodiplosis mosellana could not achieve emergence under some temperature conditions and the highest emergence rate was 8.00% under 8 ℃ for 120 days.The highest emergence rate was 33.50% under4 ℃ for 75 days after two cumulative diapauses.The remaining live cocoon rate was relatively low after two emergences,with the highest rate of 4.00%.The mortality rates of diapause cocoons and larvae were all more than 60%,up to 96.17%.