Abstract
Nephotettix cincticeps adults were confined to infected source rice plants by cages for a 24-h acquisition access period at 25°C. Immediately after the acquisition, the insects were placed one couple per rice seedling at the 2-leaf stage in a test tube for a 24-h inoculation access period at 25°C. The inoculated seedlings were grown in pots for disease development. Based on the percentage of diseased plants, 3 of 13 varieties tested with 3 replicates were determined to be moderately resistant and others were susceptible to the virus. No resistant varieties were detected. The height of diseased plants was reduced in all of the varieties.
