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马尾松毛虫对松树威胁是极大的,虽然采用许多防治措施,但目前松毛虫为害还很严重。同时由于长期用药,使松毛虫产生了抗药性、适应性以及某些条件影响而使防治效果降低,成本很高。因此,我们想用树木本身的抗性来防治松毛虫的为害,以达到降低成本,减少公害的目的。一、试验材料的确定1973年是我地区松毛虫危害最严重的一年,我们在被松毛虫为害至针叶几乎被吃光了的马尾松林内进行了每木调查。由于林子较
Masson pine caterpillar on the pine threat is great, although the use of many control measures, but the damage is still very serious. At the same time as the long-term medication, the pine caterpillars have a resistance, adaptability and the impact of certain conditions to reduce the control effect, the cost is high. Therefore, we want to use the tree’s own resistance to control the damage of pine caterpillars in order to reduce costs and reduce the purpose of pollution. First, the test material to determine 1973 is the most devastating year of the pine caterpillars in our region, we were in pine trees damaged by pine caterpillars to coniferous forest was almost eaten within the wood of each survey. Because woods more