论文部分内容阅读
防治林木害虫,过去多采用六六六粉。六六六已停产,必须选用合适的代用农药,以保证树木正常生长。
Prevention and control of forest pests, the past use of six six six powder. 666 has been discontinued, we must choose the appropriate alternative pesticides to ensure the normal growth of trees.