随着原始森林面积的逐渐减少和社会对木材需求量的不断增长,人工林的面积将逐渐扩大。从林业生产经营的观点来看,必然会造成单一树种的大面积栽培,导致人工林内的生态系统单纯和不稳定。由于人工林内的生物相贫乏,使特定害虫种群数量增加以至于猖獗危害。从目前的防治技术水平出发,随之而来的便是化学农药的防治。而用于防 With the gradual reduction of the original forest area and the increasing demand of timber in the society, the plantation area will gradually expand. From the point of view of forestry production and management, it is bound to result in large-scale cultivation of single tree species, resulting in a simple and unstable ecosystem in the plantation. Due to the lack of biomass in plantations, the number of specific pest populations is increased to the extent that it is rampant. From the current level of prevention and treatment technology, followed by chemical pesticide control. And used to prevent