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稻虱缨小蜂和拟稻虱缨小蜂是稻飞虱卵期重要的寄生性天敌。南京江浦稻田8月上旬前以稻虱缨小蜂为主,主要寄生于灰飞虱和白背飞虱卵,8月中旬以后则以拟稻虱缨小蜂占优势,主要寄生于褐飞虱卵。水稻苗期灰飞虱卵寄生率平均为27.3％,白背飞虱和褐飞虱卵寄生率,杂交稻田为10.87％和21.5％,晚粳稻田为20.67％和19.6％。白背飞虱寄生卵量与总卵量间里直线相关,而褐飞虱寄生卵量与总卵量间呈幂回归关系,回归方程分别为Y=-18.2128+0.2075x和Y=0.006807x~(1·4887)
Parasitoid louse and Parasitoid wasps are important parasitoids in the egg stage of the rice planthopper. Before the beginning of August, Nanjing Jiangpu rice fields mainly comprised the small-lousehoppers, mainly parasitizing the Laodelphax striatellus and White-backed-Siphonaptera eggs. After mid-August, the small-lipped bee-predators dominated and mainly parasitized the brown planthopper eggs. The average parasitization rate of rice planthopper eggs was 27.3%. The parasitic rates of whitebacked planthopper and brown planthopper were 10.87% and 21.5% for hybrid rice and 20.67% and 19.6% for late rice. The number of parasitoid eggs of whitebacked planthopper was linearly related to the total amount of eggs, and the regression equation was Y = -18.2128 + 0.2075x and Y = 0.006807x ~ (1) · 4887)