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光肩星天牛(Anoplophora glabripennis Motsch.,以下简称天牛)危害树干,使树木枯死,是美杨的主要害虫。为了防治此害虫,我们在河南睢杞试验林场进行了调查观察及小气候的测定,了解天牛的发生与环境的关系,并采取修枝抚育措施来减少天牛的危害。现将这一工作过程叙述如下,以供参考。一、防治天牛的修枝试验(1)修枝地点:在西寨场点约500余亩天牛危害比较严重的防护林带中,于6月中旬在250亩的林木上修去当年生萌生枝条,有一部分树木未修枝,以便对照观察。(2)修枝时间及方法:将冬季修枝改在夏季(6
Anoplophora glabripennis Motsch., Harm the trunk, the trees dead, is the main pest of Populus. In order to control the pests, we conducted a survey in Henan Qiqi Experimental Forest Farm and the determination of microclimate to understand the relationship between the occurrence of Begonia and the environment, and to take pruning tending measures to reduce the hazards of celastrus. Now the work process described below, for reference. First, the pruning control test (1) pruning sites: in Xizhai field point about 500 acres of desease more serious shelterbelts, in mid-June in 250 acres of trees to repair when the sprout Branches, some of the trees are not pruned, so that the control observation. (2) pruning time and methods: the winter pruning change in the summer (6