Preliminary Study on Suppression of the Whitebacked Planthopper, Sogatella furcifera by Cultivating the Mixture of the Resistant and Susceptible Rice Varieties
LIU Guang-jie 1; CHEN Shi-gao 2; WANG Jing-yu 3; SHEN Jun-hui 1; SOGAWA Kazushige 4; XIE Xue-mei 2; QIAO Qing-chun 2; PU Zheng-guo 2; SHI Dun-gui 2; LIU Xiang-gui 5
（ 1Chinese National Center for Rice Improvement; China National Rice Research Institute; Hangzhou 310006; China; 2Xiushan Station of Plant Protection and Quarantine; Chongqing 409900; 3Department of Plant Protection; Anhui Agricultural University; Hefei 230036; 4Japan International Research Center for Agricultural Sciences, Tsukuba 305-8686, Japan; 5Chongqing Station of Plant Protection and Quarantine, Chongqing 400020, China)
Zhekang, a near isogenic line with the resistant gene from the rice variety Rathu Heenati in pair with the variety Zhefu 802, and Zhehun, the mixture of Zhekang (resistant) and Zhefu 802 (susceptible) to Sogatella furcifera by mixing rice seeds in the ratio of 2 (Zhekang)∶1 (Zhefu 802), were used in the experiments. The effectiveness in suppression of Sogatella furcifera by planting of the mixture of the near isogenic lines with resistance and susceptibility was studied through field investigation of population dynamics of S. furcifera and measurement of honeydew excretion, number of eggs and percentage of egg developed, rice yields and 1000-grain weights. The results revealed that number of adults and nymphs of S. furcifera on Zhehun was similar with that on the resistant RHT and Zhekang, 1/2 and 1/4～1/5 less than on susceptible Zhefu 802 and TN1, respectively. Honeydew excreted by S. furcifera on Zhehun and Zhekang was 9.03 mg/♀·d and 6.97 mg/♀·d, respectively, significantly lower than that on Zhefu 802 (17.64 mg/♀·d) and TN1(19.14 mg/♀·d). There were no significant differences in total number of eggs and percentage of egg developed between Zhehun and Zhekang, and between Zhehun and Zhefu 802 and TN1. In compared with Zhekang, the yield of Zhehun increased by 1.17%, whereas the yield of Zhefu 802 decreased by 19.11%; the 1000-grain weights of Zhehun and Zhefu 802 decreased by 2 57% and 9 84%, respectively. Therefore, planting the mixture of resistant and susceptible rice materials to S. furcifera could efficiently suppress the development of S. furcifera and secured rice yield without losses.
LIU Guang-jie ,CHEN Shi-gao ,WANG Jing-yu et al. Preliminary Study on Suppression of the Whitebacked Planthopper, Sogatella furcifera by Cultivating the Mixture of the Resistant and Susceptible Rice Varieties[J]. , 2003, 17(ZK): 103-107 .