淡剑夜蛾的发生与防治

Occurrence and control of Sidemia depravata

淡剑夜蛾 Sidemia depravata( Butler)一年 5～ 6代 ,以老龄幼虫在草坪根部表土层越冬 ,世代重叠 ,4月上中旬开始出土危害 ,幼虫主要取食茎、叶 ,危害高峰期分别在 5月上中旬、 6月上中旬、 7月中下旬、 8月中旬、 9月底 10月上旬。全年以 7、 8月份危害最重 ,造成草坪发黄 ,甚至成片枯死。保护天敌 ,适时修剪草坪 。

Sidemia depravata has 5 or 6 generations a year and overwinters as mature larva in the surface layer of lawn soil.The generations overlap.The larvae feed on stems and leaves.The peaks of damage is in the first ten days and mid of May,that of June,mid and last ten days of July,mid August and end of September to first ten days of October respectively.The damage is most serious in July and August.Protecting natural enemies,pruning lawns timely...