【摘要】 为了分析新疆地区利用物理方法防控棉铃虫的效果,2009年4-8月,在棉花实验田对棉铃虫卵进行不同降雨强度的冲刷,并在实验室用泥土进行不同方式的包埋,在不同土壤湿度下进行孵化实验。结果表明,大雨、暴雨和大暴雨冲刷率较高,降雨强度越大,冲刷率越高;在被泥土完全包埋的情况下,无论在哪种湿度下都不能孵化,在半包埋和不包埋的情况下,孵化率都较高,差别不大,与土壤湿度相关性不显著;天然降雨的机械致死作用有限。因此,靠降雨冲刷在新疆这类干旱地区并不实用,因为当地降雨强度小、持续时间也短。更多还原

【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.更多还原