Mediations of Rice Volatiles on Intra-and Inter-specific Relationships of Brown Planthopper (Nilaparvata lugens)and Whitebacked Planthopper (Sogatella furcifera)

Mediations of volatiles on host plant selection by brown planthopper (BPH) and whitebacked planthopper (WBPH), and on intra and inter specific relationships of BPH and WBPH were studied using rice variety TN1. Results showed that volatiles of health rice attracted BPH and WBPH apparently. Volatiles emitted from rice sucked by one planthopper species for 12 h, attracted the other planthopper species, but it had no significant effect (attraction and deterrent) on conspecific planthopper. Both of the two species of planthoppers avoided sucked rice and preferred to health rice when the damage became seriously.