When eggs placed out of the wood block, egg stage is 13 ~ 15days, average hatching rate and average parasite rate are increased, they are 83.3% and 87.5% respectively.
卵放在木段外，卵期缩短为13 ~ 15天，平均孵化率及初孵幼虫对光肩星天牛幼虫的平均寄生率均有所提高，分别为83.3%和87.5%。
The rate of egg hatching can reach over 90 percent.
在正常情况下，卵的孵化率达90%以上。
The extracts of acetone and petroleum ether had no effect to the hatching rate and egg development duration, but they were toxic to the newly hatched larvae of Plutella xylostella.
丙酮和石油醚提取物对小菜蛾卵的孵化及卵的发育历期没有影响，但有增加初孵幼虫死亡率的作用。
应用推荐