褐飞虱和白背飞虱在抗褐飞虱水稻品种上的行为反应

以ASD7、IR36、粳籼89(JX89)、Mudgo四个抗褐飞虱水稻品种和感性品种TN1为材料,比较了褐飞虱和白背飞虱在这些品种上的行为反应。褐飞虱对抗性品种表现出明显的非嗜好性。褐飞虱自4h、白背飞虱自8h以后,各品种上的着虫量与TN1差异显著,而其它各品种上的虫量无明显差异(Mudgo除外)。白背飞虱选择各抗性品种的百分率明显大于褐飞虱(Mudgo除外);同一水稻品种上的稻飞虱数量无时间上的规律性。两种稻飞虱在抗性品种和TN1上的取食量差异显著。取食同一品种时,白背飞虱在IR36、JX89上的取食量大于褐飞虱,且相互间差异显著。两种稻飞虱在四个抗性品种上的取食痕数量明显多于TN1;两种飞虱在ASD7和JX89上的取食痕数量差异显著,白背飞虱的数量明显少于褐飞虱。在所有水稻品种上的取食痕数量与取食量呈明显的负相关关系。

Behavioral responses of brown planthopper and white-backed planthopper to BPH-resistant rice varieties

Comparisons among the behavioral reactions of brown planthopper ( BPH) Nilaparvata lu-gens Stal and white-backed planthopper (WBPH) Sogatella furcifera (Horvath) fed on four BPH-resistant (ASD7, IR36, JX89 and Mudgo) and one BPH-susceptible (TN1) rice varieties were conducted . BPH showed evident non-preference reaction to these resistant varieties, and there were significant differences between BPH (4h after inoculation)/WBPH (8h after inoculation) densities on resistant and susceptible varieties, while the planthopper densities on BPH-resistant varieties, except Mudgo, were similar. On the same BPH-resistant variety, the preference rate on WBPH were significantly higher than that of BPH. There was no time regularity of planthopper density on any rice variety. Both the feeding amounts of BPH and WBPH on resistant varieties were markedly lower than those on TN1, while in comparison with the feeding amounts of BPH on IR36/JX89, those of WBPH were obviously higher. Contrarily, the probing wound number of the two planthopper species on resistant rice varieties were much more than that on TN1, but those of WBPH on ASD7/JX89 were much less than those of BPH. Consequently, there is a negative correlation between the probing wound number and feeding amount of planthopper on any rice variety.