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近几年,棉铃虫在我国棉产区猖獗成灾,其发生量之多、为害之重,均为历史上所罕见。据专家预测,今年将又是棉铃虫大发生年。实践证明,要想有效地控制棉铃虫的危害,必须要采取以下综合防治对策。一、科学用药是防治的关键1.掌握最佳用药时机。棉铃虫幼虫一般在孵化后第二天就为害生长点,第四天转移到幼蕾蛀孔为害,可用药控制的时期很短;同时幼虫在孵化后四天内对农药最为敏感,随着龄期的增大,抗药耐药性大幅度增
In recent years, the cotton bollworm rampant in China’s cotton-growing areas, the amount of occurrence, the heavy damage, are rare in history. According to experts predict that this year will be another major occurrence of cotton bollworms. Practice has proved that in order to effectively control the harm of cotton bollworm, we must take the following integrated control measures. First, scientific medication is the key to prevention and control 1. Master the best time to medication. Helicoverpa armigera larvae generally damage the growth point the next day after hatching, the fourth day transferred to the young Lei bore hole harm, the time can be controlled by a very short period; the same time larvae are most sensitive to pesticides within four days after hatching, with the age Increase, drug resistance increased significantly