如何提高棉铃虫的化学防治效果

• 作 者: 孟庆修
• 机 构: 山东省寿光工贸职业中专,
• 出 处: 科技致富向导
• 发表日期: 1996年06期
• 关键词: 棉铃虫 化学防治 卵粒 药都 幼虫孵化 防治时机 四代棉铃虫 防治关键 发生数量 褐色

一、抓住喷药时机棉铃虫幼虫孵化后,仅三、四天的时间裸露在外,以后即钻蛀蕾铃。因此每次打药都要集中力量打歼灭战,力求在两、三天内结束。防治关键时期要根据田间查卵情况确定。如果棉田卵株突然增多,并有一半卵粒变成黑褐色即将孵化时为最佳防治时机。

First, seize the timing of spraying Helicoverpa armigera larvae hatch, only three or four days exposed, that is, after boring bollworms. Therefore, each fight drug must focus on fighting the annihilation war, and strive to end in two or three days. The key period of prevention and control should be determined according to the situation of ovulation in the field. If the cotton field suddenly increased ovum, and half of the egg into brown to hatch when the best opportunity for prevention and treatment.