菜青虫是十字花科蔬菜上最常见的虫子。幼虫咬食叶片,留下一层透明表皮,随着幼虫生长,食量增加,把叶片吃成孔洞或缺口,严重时叶片全部被吃光,只残留粗叶脉和叶柄。每日早晚手抓办法虽然笨拙,但对人畜无害
菜青虫是十字花科蔬菜上最常见的虫子。幼虫咬食叶片,留下一层透明表皮,随着幼虫生长,食量增加,把叶片吃成孔洞或缺口,严重时叶片全部被吃光,只残留粗叶脉和叶柄。每日早晚手抓办法虽然笨拙,但对人畜无害
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