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稻瘟病又名稻热病,是世界性病害。全国每年都有发生,流行年份一般减产10%～20%,严重的达40%～50%以上。去年部分地区发生严重,今年的气候反常,估计还将发生。但只要防治到位,减少损失还是没有问题的。稻瘟病防治应以种植抗病品种为主,以搞好田间肥水管理为重点,在发病期辅以药剂防治。抗病品种的选育和利用选育抗病品种在水稻育秧期开始,即选用具有抗病基因的品种。但具有抗病基因的品种能否抗病是建立在寄主和病菌的遗传基因相对应的基础上。因此在选育抗病品种时,必须注意病菌生理小种的变化,应针对当地的优势小种进行
Rice blast, also known as rice fever, is a worldwide disease. Occurred every year in the country, the general decline in popular years, 10% to 20%, a serious 40% to 50% or more. Serious weather occurred in some areas last year and this year’s climate anomaly is estimated to occur. But as long as prevention and control is in place, there is no problem in reducing losses. Prevention and treatment of rice blast should be mainly resistant to the cultivation of varieties, to improve field fertilizer and water management as the key point, supplemented with agents in the pathogenesis of prevention and treatment. Breeding and utilization of disease-resistant varieties Breeding resistant varieties in rice seedling stage, that is, the selection of varieties with resistance genes. However, it is based on the genetics of the host and the germ that the varieties with the disease-resistant genes can be resistant. Therefore, in the selection of resistant varieties, we must pay attention to the changes of pathogenic bacteria races should be targeted for the advantages of races