农药合理混合使用可以提高防治效果,扩大防治范围,减少用药量,降低生产成本等,具体介绍如下. 1.减缓产生抗药性:任何一种农药经过一段时期使用后,它所防治的病、虫、草、鼠害都会产生一定的抗药性,防治效果随之降低。如我国80年代初试用和推广的拟除虫菊酯类农药,目前已有30多种害 A reasonable mix of pesticides can increase the effectiveness of prevention and treatment, to expand the scope of prevention and control, reduce the dosage, reduce production costs, etc., as described below 1. To reduce the emergence of resistance: any kind of pesticides after a period of use, , Grass, rodents will have a certain resistance, the control effect will be reduced. Such as China’s early 80s trial and promotion of pyrethroid pesticides, there are already more than 30 kinds of damage