問(wèn)答題田間發(fā)現(xiàn)玉米幼苗主根被害蟲(chóng)咬斷,斷口整齊平滑。仔細(xì)檢查被害株根部土壤,發(fā)現(xiàn)此害蟲(chóng)身體污白色,肥胖多皺紋并彎曲成“C”字形,具3對(duì)較發(fā)達(dá)的胸足,無(wú)腹足。則此害蟲(chóng)屬于哪類害蟲(chóng)?如何對(duì)該類害蟲(chóng)進(jìn)行防治?

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