Effect of transgenic Bt rice on dispersal of planthoppers and leafhoppers as well as their egg parasitic wasps

Abstract

Effects of TT9-3 and TT9-4, which are two homozygous strains of transgenic Bt rice, on the dispersal of planthoppers and leafhoppers as well as their egg parasitic wasps were evaluated in the field. The results were as follows: there were two species of planthoppers and three species of leafhoppers dispersing between the Bt rice paddy and the control, namely, Sogatella furcifea, Nilaparvata lugen, Nephotetix cincticeps, Erythroneura subrufa and Deltpcephalus dorsalis. Among these five species, Sogatella furcifea and Nephotetix cincticeps were superior. In the field, dispersal amount of leafhoppers was more than that of planthoppers, and the dispersal direction was mostly toward the plot of non-transgenic rice. There was the significant difference (P<0.05) in the number of Sogatella furcifea as well as Nephotetix cincticeps dispersing both between IR72 and TT9-3 and between IR72 and TT9-4. There were two groups of egg parasitic wasps of planthopper and leafhopper dispersing between the plot of transgenic Bt rice and the control, named as Anagrus spp. and Lymaenon longicrus, with the number of the latter being more than that of the former, and the dispersal mostly toward the block of non-transgenic rice.

Keywords

• transgenic Bt rice
• planthopper
• leafhopper
• egg parasitic wasp
• dispersal