以往人们防治害虫时,总是要用农药,结果许多害虫还是照样发生,产生了抗药性的害虫甚至对作物危害更加严重了。以死虫防治活虫,为人们防治害虫开辟了一条独特有效的途径。 In the past, pest control was always carried out when pests were used. As a result, many pests still took place. Pest resistance was even worsened by the crops. Controlling live insects with dead insects opens up a unique and effective way for people to control pests.