Abstract: To reveal the effect of prevention and controlling Helicoverpa armigera by physical methods in Xinjiang region,the field experiment of scouring by different rainfall intensity and lab experiment of covering by different soil was conducted.The results showed that scouring rate increased with intensity of rainfall.The eggs couldn't be hatched if they were completely covered by mud.However,it could be hatched if they were half covered,even same to without covered by mud.Hatching rate had low correlativity to soil moisture.It was difficult to kill the eggs by rainfall.So it was not practice that controlling Helicoverpa armigera just by rainfall in Xinjiang region.

Key words: Eggs of Helicoverpa armigera, Eggs of Helicoverpa armigera, Rainfall intensity, Soil moisture, Hatching rate