南方水稻黑条矮缩病在广西灵川县的发生与防治初探

The occurrence and control of rice black-streaked dwarf in Southern China

南方水稻黑条矮缩病在南方稻作区发病流行趋势明显,危害程度明显加重。为探索对该病的有效防控措施,通过对发病田块从栽培措施和药物防治相结合的方法,在水稻不同生育期进行药物芸苔素、锌锰叶面肥、吡虫啉+异丙威、氨基寡糖素、漯丰王叶面肥、50%氯溴异氰尿酸的防治试验。试验表明,中稻在4月20日前播种的可在分蘖期与稻飞虱迁入高峰期错开,感病田块在移栽20d内用药防治的减产不显著,防效好。

Rice black-streaked dwarf is a kind of epidemic disease in Southern China and its endangerment is increasing obviously.In order to explore its effective control measures,by means of integrated control methods in occurring fields,some chemicals are applied in different stages as an experiment.The results showed that middle rice seeding before 20th April,planthopper ingoing peak can be staggered with tillering stage.Chemical control within 20 days after transplanting in diseased fields,the yield decrease is not obvious and the control effect is satisfaction.