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云南白小叶蝉(Elbelus yunnanensis)1992年以来在我省发生较为广泛,淮河以北发生严重,江淮之间亦有发生,主要危害楝树,受害叶片出现黄斑,易感病、早脱落,影响楝树的生长,该虫在我省发生的代数不一。为了掌握云南白小叶蝉的生长发育规律,本试验讨论其若虫发育历期与温度的关系,并对其计算出拟合曲线,为预测预报提供依据。1 材料与方法1.1 材料云南白小叶蝉若虫、新鲜楝树叶、
Elbelus yunnanensis has been widespread in our province since 1992, serious in the north of the Huaihe River and between the Yangtze River and the Huaihe River. The main hazards are the neem tree, the affected leaves have yellow spots, susceptible to disease, early fall off and neem Tree growth, the insects in our province occurred in different algebra. In order to grasp the law of growth and development of the white leafhopper in Yunnan, the relationship between the developmental period and temperature of its nymphs was discussed in this experiment. The fitted curves were calculated to provide the basis for the prediction. 1 Materials and methods 1.1 Materials Yunnan white leafhopper nymphs, neem leaves,