Biotech Updates

Effect of Single and Pyramided Bt Rice on Planthoppers' Responses to Elevated CO2 and Temperature

October 23, 2013

Scientist Guijan Wan from Nanjing Agricultural University and colleagues conducted a study to evaluate the effect of pyramided (Cry1Ab/Cry1Ac) and single (Cry1Ab) Bt transgenic rice on the responses of planthoppers (Nilaparvata lugens, Laodelphax striatellus and Sogatella furcifera) to increased carbon dioxide and temperature.

Results showed that the Bt rice lines affected the responses of the planthoppers to elevated carbon dioxide and temperature. High carbon dioxide led to increased occurrence of S. furcifera relative to N. lugens and L. striatellus, when fed with pyramided Bt rice at high temperature. On the other hand, exposure to high carbon dioxide and temperature decreased the occurence of S. furcifera fed with single Bt rice. When compared with the parental lines, the single Bt rice had better performance at controlling the non-target planthopper S. furcifera than the pyramided Bt rice under increased carbon dioxide and temperature. Thus, the authors recommended that different types of Bt rice should be used in field simultaneously for optimal performance against various pests in paddy fields.

Read the abstract at