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营林技术措施不仅可以促进林木速生丰产,而且是防治林木害虫的有效方法之一。通过营林技术措施能改变害虫发育繁殖的条件,抑制害虫的发生;可以改变林间昆虫和其它生物的种类及组成,使害虫的天敌增多;可以直接消灭害虫,大大减少其数量;可以提高林木抵抗能力,减轻其为害。它是“防重于治”的重要手段,是林木害虫综合防治工作中必不可少的内容。现就营林技术措施的主要方面,结合我省实际情况,举例说明它对防治林木害虫的作用。 一、选择抗虫树种或品种:近几年来在南京、溧阳、苏州等地发现的松干蚧是马尾松和赤松的毁灭性害虫,引起松树枯死.
Technical measures of silviculture not only can promote fast growing and yielding trees, but also one of the effective ways to control forest pests. The technical measures of silviculture can change the conditions for the development and reproduction of pests and restrain the occurrence of pests; the species and composition of insects and other organisms in the forests can be changed to increase the natural enemies of pests; the pests can be directly eliminated and the number of pests can be greatly reduced; To resist the ability to reduce its harm. It is an important means of prevention and control of diseases and is an indispensable element in the comprehensive prevention and control of forest pests. Now on the main aspects of technical measures for forest management, combined with the actual situation in our province, an example of its role in the prevention and control of forest pests. First, the choice of insect species or varieties: in recent years in Nanjing, Liyang, Suzhou and other places found in pine and scale pine is the devastating pest of pine and pine, pine caused dead.