菜青蟲是十字花科蔬菜上最常見的蟲子。幼蟲咬食葉片,留下一層透明表皮,隨著幼蟲生長,食量增加,把葉片吃成孔洞或缺口,嚴重時葉片全部被吃光,隻殘留粗葉脈和葉柄。每日早晚手抓辦法雖然笨拙,但對人畜無害
菜青蟲是十字花科蔬菜上最常見的蟲子。幼蟲咬食葉片,留下一層透明表皮,隨著幼蟲生長,食量增加,把葉片吃成孔洞或缺口,嚴重時葉片全部被吃光,隻殘留粗葉脈和葉柄。每日早晚手抓辦法雖然笨拙,但對人畜無害
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