2003年7月9日,笔者等在洛阳市宜阳县莲庄乡夏播玉米田调查,发现1块地天牛幼虫为害玉米,受害株率达10%左右,这在本市尚属首次。天牛幼虫特征:头部红褐色,体长3～5cm,前胸盾近梯形,两侧有浅沟,腹部背面1～7节正中隆起,上有扁“田”字形纹。初步鉴定为蔗根土天牛[Dorysthenesgranu July 9, 2003, I was in Luoyang City, Yiyang County, Lin Zhuang rural summer sowing corn field survey found that a day to cattle larvae damaged corn, affected strain rate of 10%, which is the first time in the city. Beetle larvae characteristics: head reddish-brown, body length 3 ~ 5cm, chest shield nearly trapezoidal, both sides of the shallow groove, the back of the abdomen 1 to 7 middle uplift, flat “Tian” glyphs. Preliminary identification of Canellotus glauca [Dorysthenesgranu