稻瘟病是北安市主要的农业有害生物之一,每年均有不同程度的发生危害,流行年份一般减产10%～20%,严重的达40%～50%。稻瘟病菌以分生孢子和菌丝体在病稻草和病种子上越冬。病稻草上的病菌即可产生分生孢子,借气流传播到水稻上,带病稻草是初侵染的主要来源。近几年我们对北安地区水稻稻瘟病防治技术进行配套组装,取得了较好的效果。 Rice blast is one of the main pests of agriculture in Bei’an City. It is harmed to varying degrees each year. The epidemic years generally reduce the yield by 10% -20% and seriously by 40% -50%. Magnaporthe grisea winters with conidia and mycelium on diseased straw and diseased seeds. Pathogenic bacteria on the sick straw can produce conidia, spread by air to rice, sick straw is the main source of initial infection. In recent years, we have carried out ancillary assembly to rice blast prevention and control techniques in Bei’an region and achieved good results.