Control efficacy of different measures in the whole course onrice black-streaked dwarf disease in south China

Trials of control efficacy for the rice black-streaked dwarf disease in south China were conducted in Shunchang County with different control measures in the whole course in 2014. The results showed that the best control efficacy was received when controlled by covering 30 mesh fly net in rice seedling stage and spraying 60 g 30% Dufulin WP and 24 g 25% Pymetrozine WP per 667 m² three days before transplanting and ten days after transplanting. The control efficacy ratio reached 90.48%, and the rice yield was increased by 25.75%, which indicated that the control measure in the whole course for rice black-streaked dwarf disease could be widely popularized and applicated.