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五月春夏之交,天气渐热。天牛等蛀干性害虫逐渐进入化蛹阶段,食叶性害虫开始增多,但刺吸式害虫仍然是防控的主要对象,蚜虫、叶蝉、木虱、蚧虫等为害明显。长江流域藤壶蚧的防治工作不能懈怠;青桐木虱、合欢木虱、梨网蝽也开始大量繁殖,受害植物出现症状;本月底引起严重煤污的另一重要害虫红蜡蚧开始产卵孵化。
May spring and summer, the weather getting hot. Beetle and other borers gradually entered the pupal stage of dry pests, leafy pests began to increase, but suction sucking pests is still the main target of prevention and control, aphids, leafhoppers, psyllids, scale insects and other damage significantly. Prevention and control of the vine scale in the Yangtze River Basin can not slack off; Green Tong Ps, Acinetobug psittaci, Pear bug also began to multiply, the victim plant symptoms; the end of this month caused serious coal pollution another important pest Red wax scale began spawning hatch .