日本龟蜡蚧产卵量和卵期的测报

Studies on the Estimation of Egg Number and Oviposting Phase of Ceroplates japonicus Green

对寄生在茶树、栀子花上的日本龟蜡蚧雌蚧体重、长短径积、厚度与产卵量之间的相关性分析结果表明，它们之间的相关性均达极显著水平，其中体重（ｘ）与产卵量（ｙ）的相关关系最为显著，且在测报中最简便实用。其方程式分别为。其卵期发育起点温度（Ｃ）和有效积温（Ｋ）分别为Ｃ＿茶树＝１５．５℃±１．０℃、Ｋ＿茶树＝１９９．２（ＤＤ），Ｃ＿栀子＝１５．０℃±０．８℃、Ｋ＿栀子＝２１６．４４（ＤＤ）。

Analysis on the relation between the weight and size of female adults of Ceroplates japonicus and theirovipositing amounts was carride out.The egg number was closely related with the female adult weight,whichwas a simple and effective way to be used to predict the outbreak of the pest.The regression equations wereas follows:y_1=345.92+94.2x(for tea plants)and y_2=-442. 92+96.5x(for jasmine).The initial temper-ature for egg development(C)and effective accumulated tenlperature(K)were as follows:C_1=15.5℃+1.0℃,K_1=199.2(DD)and C_2=15. 0℃+0.8℃,K_2=216.44(DD).These parameters would provide anestimation of the pest population, and a prediction of the optimum time for the pest control.