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黄斑星天牛 Anoplophora nobilis G.是北方杨树重要蛀干害虫,其发生期与发生量的预测是综合治理的基础工作。我们于1981～1982年在甘肃省甘谷县、天水市,对黄斑星天牛卵和蛹的发育进行了研究。黄斑星天牛成虫在产卵以前,选择一定胸径的杨树,刻一与树干垂直的横槽,然后在韧皮部与木质部之间产一卵。由成虫产卵时分泌的腺液,腐蚀刻槽内的韧皮部与木质部,以供给初孵幼虫合适食料。刻槽外形随着卵的发育而变化,可根据刻槽外形及颜色的变化把卵的发育期分为4个阶段:初产期,刻槽棕黄色,卵乳白色,发育1～4天;中期,刻槽浅褐色,有树液外流,卵乳黄色,卵期5～9天;后期,刻槽深褐色,周围显湿斑,卵乳黄至黄棕色,刻槽内溢满树脂,卵期约10～
Anoplophora nobilis G. is an important borer insect in northern poplar. The prediction of its occurrence and occurrence is the basic work of comprehensive management. We studied the development of eggs and pupae of Astragalus stearothermophilus from 1981 to 1982 in GanGu county and Tianshui city, Gansu province. Before oviposition, adults of the Asclepiadus ovatus select poplars of a certain diameter and engrave a transverse groove perpendicular to the trunk, then produce an egg between the phloem and the xylem. The glandular fluid secreted by the adult spawns and corrodes the phloem and xylem in the groove to provide suitable food for the newly hatched larvae. The shape of the groove varies with the development of the egg. According to the shape and color of the groove, the developmental stage of the egg is divided into four stages: the primiparous stage, the grooved brownish yellow and the egg white, which develop for 1 to 4 days; , Groove light brown, sap efflux, egg yolk, oviposit 5 to 9 days; late, cambos dark brown, around the wet plaque, egg milk yellow to yellow-brown, About 10 ~