A.卵 B.幼蟲(chóng) C.蛹 D.成蟲(chóng) E.預(yù)蛹
A.蝗蟲(chóng) B.蚜蟲(chóng) C.松毛蟲(chóng) D.天牛 E.葉蜂
A.取食量少,還未造成損失 B.體壁薄弱,藥劑易滲入蟲(chóng)體 C.活動(dòng)頻繁易與藥劑接觸 D.只在嫩葉上取食,故只需在嫩葉噴藥 E.蟲(chóng)體小,抗藥力