【摘要】 森林害虫是用材林的大敌。在森林害虫科学管理决策专家系统中 ,害虫危害的经济阈值是最重要的判别依据。该文通过大量的调查 ,系统的研究和实际检测 ,确定了食叶害虫种群控制、蛀干害虫种群控制和树干韧皮部害虫营林防治经济阈值模式更多还原

【Abstract】 The forest insect pests are main enemies of timber forests. The economic thresholds of insect pests are the most important distinguish basis in the scientific management system of forest pests.The paper establishes the economic threshold mo deles of leaf pest population management,trunk wood pest population management and trunk phloem pest forest management after investigation,systematic study and test.更多还原