杨黄卷叶螟

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危害杨黄卷叶螟又叫黄翅缀叶野螟,属鳞翅目,螟蛾科,是速生杨叶部的主要害虫之一。此虫每年发生4代,幼虫孵化后,分散啃食叶表皮,并吐出白色粘液涂在叶面,随后吐丝缀嫩叶呈饺子形,或在叶缘吐丝将叶折叠,藏在其中取食。长大后的幼虫群集顶梢吐丝缀叶取食。多雨季节最为猖獗,3天~5天内即把嫩叶吃光,形成秃梢,对树势的影响极大。幼虫在卷叶内、地被物上或树皮缝隙处吐丝结白色薄茧越冬。
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