金秋十月,一棵棵玉米像英武的士兵,饱满的玉米穗像士兵腰里的手榴弹;高粱穗沉甸甸的,把秸秆都压弯了腰;朵朵的棉花将棉田染成一片雪白。在这丰收的季节也是害虫肆虐的时节,它们也想趁着这个好时光把肚子填饱,并为孕育下一代或过冬储备足够的营养。对付这些害虫光靠农药不行,因为农药不仅容易使害虫产生抗药性,还会对环境造成一定的污染,同时还会通过食物链进入我们人体,进而影响我们身体健康。生物防治是绿色无污染的防治害虫的方法,但自然条 In October of the golden autumn, the corn trees were like armies of soldiers. The full ear of corn resembled the grenade in the soldier’s waist; the sorghum was heavy and bent the stalks; the blossoming cotton dyed the cotton field into a snow-white. In this harvest season is also a time when pests are rampant, they also want to take advantage of this good time to fill their stomachs, and to reserve enough nutrition for the next generation or winter. To deal with these pests is not enough to rely on pesticides, because pesticides not only make pests resistant to insecticides, but also cause some pollution to the environment. At the same time, they will enter our bodies through the food chain, which will affect our health. Biological control is a green and pollution-free method of controlling pests, but natural