长期以来,棉农防治病虫害,习惯采取喷雾法。但这样做一是易造成药液损失(约有50％的药液流落于地面);二是污染环境,极易引起人畜中毒;三是大量杀伤天敌,破坏生态平衡;四是防治费用高,加重棉农经济负担。相反,隐蔽施药法则能够克服上述弊端,值得大力推广应用。 For a long time, cotton farmers control pests and diseases, used to take the spray method. First, it will easily lead to the loss of liquid medicine (about 50% of the liquid will fall on the ground); secondly, it will pollute the environment and easily lead to poisoning of human and animals; third, it will kill a large number of natural enemies and destroy the ecological balance; Increased cotton farmers economic burden. On the contrary, the hidden application rule can overcome the above drawbacks and is worth popularizing and applying.