南方水稻黑条矮缩病在融水的发生及化学防治技术

Occurrence and Chemical Control Techniques of Rice Black Stripe Dwarf Disease in Rongshui County

在广西融水县通过采取调查、观察和试验相结合的方法,研究了杂交稻南方水稻黑条矮缩病的化学防治技术。试验设置3个处理,即无水、灌浅水和灌深水,每处理面积67 m^2。每667 m^2用2.0亿/g枯草芽孢杆菌可湿性粉剂40 g和25%吡蚜酮可湿性粉剂20~30 g对水30 kg喷施1次。喷药当天每个处理挂牌标记100丛染病稻丛以供田间观察。试验结果表明,南方水稻黑条矮缩病的防治,宜采用排干田水,再均匀喷施枯草芽孢杆菌加吡蚜酮混合液的方法,喷药后保持田间湿润6~7 d,具有较好的防治效果。

In this paper,the chemical control techniques of black stripe dwarf disease was studied,by taking the investigation,observation and test in Rongshui county.The test set up 3 treatments(no water,shallow water and deep water),each treatment area is 67 m2.The control agents are 40 g 200 M/g bacillus subtilis and 24 g 25%Pymetrozine WP per 667 m2,applied it once;on the day of spraying,each treatment was marked with 100 infected rice clumps for field observation.The results showed that the better control effects of black stripe dwarf disease of rice in south China could be done by draining rice field water and spraying bacillus subtilis and Pymetrozine mixture evenly,and keeping the field wet for 6~7 days after spraying.