Resistance Performance of Rice Varieties (Combinations) to Brown Planthopper,Nilaparvata lugens,in Paddy Field

Resistance performance of 48 rice varieties (combinations) to brown planthopper (BPH),Nilaparvata lugens Stl,was evaluated in single season rice field during BPH population outbreak of year 2007. Results showed that 16 varieties(combinations) were susceptible while the other 32 varieties (combinations) were highly or moderately resistant to BPH. Bing 04-123,Ⅱ you 845,Yixiang 845,Zhongzu 14,Jiaxingyou 04-1 and IR36 showed high resistance. Besides the 5 varieties with high resistance,other varieties including Xiushui 09,Xinjiayou 99,Jiayou 22-5,Xiuyou 0969,Ning 04-81,Bing 04-103,Bing 04-08,Bing 04-123,R4101,Bing 04-132,Bing 05-129,Bing 05-227,Zhejing 23 and Zhejing 22 also had long durable resistance characteristics. The results imply that rating resistance of rice varieties to BPH in paddy field at the adult stage of rice was much more importance in screening and evaluating resistance resources for optimizing the layout and application of new-bred resistant varieties as one of key strategies of integrated pest management.