冬季是消灭害虫的重要时机,“冬天捕足一个蛹,夏天就少万条虫”。冬季灭虫可用以下方法。 一、压碎虫卵。有些害虫,如危害苹果、杏、梨、杨等树种的天幕毛虫,舞毒蛾等,产卵在树枝拐弯处的表皮上,形成环状卵块或卵袋;还有些害虫是在树枝的隐蔽处织个丝茧,然后化蛹冬眠。冬季修剪树木时,应注意把这些卵块、卵袋、蛹茧等压碎或捏烂。 二、剪除带卵枝。有些害虫,如传染枣疯病、腐烂病的蝉、天牛等,产卵时用锋利的产 Winter is an important time to eliminate pests, “catch a pupa in winter, summer, less million worms.” Winter pest control available the following methods. First, crush eggs. Some pests, such as endangered caterpillars, gypsy moths and the like that endanger the apple, apricot, pear, and poplar trees, spawn on the epidermis at the corner of the branch to form a ring-shaped egg or egg pocket; A silk cocoon, and then pupation hibernation. Winter pruning trees, should pay attention to these eggs, egg bags, pupal cocoon crushed or kneaded. Second, cut off with egg branches. Some pests, such as transmission date mad, rotten cicadas, celastrus, spawning sharp production