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松毛虫是一种繁殖力很强的害虫,它能够远距离迁飞、传播,扩散非常迅速,对松树危害特别严重。笔者根据生产实践,现提出防治松毛虫的几种简便易行的方法。根据松毛虫秋季气温下降时下树越冬和春季气温回升时上树取食的活动规律,可进行树干塑料围环阻隔害虫上树、涂毒环触杀害虫和扒树盘及地下施药等。具体方法如下: 1、塑料围环:在松毛虫上树前,把宽4厘米的塑料条围树干缠绕,相互重叠1～2厘米,用图钉在重叠处按住,由于
Dendrolimus is a very fertile pest, it can migrate long distances, spread, spread very quickly, particularly detrimental to the pines. According to the author’s production practice, I propose several methods to control pine caterpillars. According to the activity of pine tree when the temperature drops in autumn when the tree is overwintering and the spring temperature picks up, the tree plastic trunk can be used to block the pests on the tree, the poison ring to kill the pests and the grub tree disk and the underground pesticide. Specific methods are as follows: 1, plastic ring: the pine tree on the tree, the width of 4 cm plastic strips around the trunk, overlap each other 1 to 2 cm, with thumb tacks at the overlap at the press, due to