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贵州惠水地区白背飞虱Sogatella furcifera(Horvath),在室内自然变温条件下,1980—1983年饲养结果均可完成6个完整世代,其中1年可繁殖7代。从6010头个体中加权法算出在不同温度下的卵历期6.16—16.67天,若虫期11.17—20.7天,成虫历期变幅较大6.05—36.32天。本试验计算的白背飞虱温度与发育时间的理论公式,验证了惠水4年来多点系统调查的田间实际发生期。根据田间发生规律,一般以第二代为主害代,预报的重点应放在成虫迁入大田高峰期和迁入量,用本理论公式和田间繁殖系数,即可计算出下一代初龄若虫高峰期和发生量,做到准确及时和经济有效地进行防治。
The whitebacked planthopper Sogatella furcifera (Horvath) in Huishui area of Guizhou province can be completed in 6 complete generations from 1980 to 1983 under natural indoor temperature conditions, of which 7 generations can be reproduced in one year. From 6010 individuals weighted method to calculate the egg temperature at different temperatures 6.16-16.67 days, nymphs 11.17-20.7 days, larger adult amplitude 6.05-36.32 days. The theoretical formula of temperature and developmental time of whitebacked planthopper (BPPH), calculated in this experiment, verified the actual field occurrence of the multi-point systematic survey in Huihui over the past four years. According to the law of the field, the second generation is the main generation, the focus of prediction should be placed on the peak of adult immigrations into the field and the amount of immigrants. Using this theoretical formula and field propagation coefficient, the peak of the next generation of early-age nymphs can be calculated Period and the amount of occurrence, so accurate and timely and cost-effective prevention and treatment.