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Srudies on the Occurence and Forecasting of Rice Planthoppers in Wuhu Area of Anhui Province

Zhu changwen(Plant Protection Station of Wuhu County,Anhui Province 241100)  
Information about occurrence of Planthoppers (Sogatella furcifera Horvath and Nilaparvata Lugens Stal)in Wuhn area from 1976 to present was analysed.The results showed the occurrence rule and offect factors,The incidenct model of Sogatella furcifera was developed according to correlation analysis between monitoring date and meteorological data:y 1=185.43+13.27X 15 -1.55X 16 +0.55X 30 and correlation rate with previous records was 93.8%.The incidence model of Nilaparvata Lugens was y 2=246.97+79.59X 4 -2.94X 6 -1.31X 7 and correlation rate with Previous records was 88.2%.The predicted results were compatible with the observation made in 1993~1995.
【CateGory Index】: S431
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