1958年6月我在西安市国营草滩农场,发现甜菜的茎秆有枯裂现象,用手剥开内有幼虫及成虫,经鉴定为甜菜茎象(虫甲)(Lixus subtilis Sturm.),被害严重的植株茎秆折断,提前枯死,有的上半部枯死,从而影响种子产量。 (一)形态 卵:卵圆形,淡黄色,长1毫米,宽0.6毫米,表面略带光泽。 幼虫:属蜂式幼虫,胸腹无足,体白色,圆柱形,弯曲成弓形。头淡棕色在冠缝之两侧,各有一淡色曲纹 In June 1958, at the state-run beach farm in Xi’an, I found that the stalks of sugar beet were dry, and the larvae and adults were peeled off by hand, which was identified as Lixus subtilis Sturm. Severe plant stems broken, dead early, and some died on the upper half, thus affecting the seed yield. (A) Morphology Egg: oval, light yellow, 1 mm long, 0.6 mm wide, the surface slightly shiny. Larvae: a bee larvae, lack of chest and abdomen, body white, cylindrical, curved into a bow. Head light brown on both sides of the crown seam, each with a light color curve