If 1000 and 2000 times liquid of 40% omethoate and 1000 times of DDVP were used during the hatching period of the first nymphs, the death rate would be quite high.

• 使用40%25氧化乐果1000倍液、2000倍液以及80%25敌敌畏1000倍液，在第一代若虫孵化期防治，均有较好的杀虫效果。