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我州地处云贵高原,海拔114—1890米,群山起伏,溪河纵横,日照短,雾露重,降水量大,气候类型、作物种类及其生育期多样,垂直差异明显,海拔每升高100米,降水量递增20～40毫米,气温递减0.55～0.6℃,水稻生育期延长2～3天,以上特点,构成了极利于稻瘟病发生与流行的复杂的环境条件,成为我州水稻上的严重病害,是稻谷高产的一大障碍。为了搞好本地区的预测预报和提高利用抗病品种防治稻瘟病,近年来,我们在以前研究的基础上开展了稻瘟病菌生理小种的研究。
I state is located in the Yunnan-Guizhou Plateau, 114-1890 meters above sea level, mountains and downs, vertical and horizontal river, short sunshine, heavy fog, heavy precipitation, climate type, crop types and their growth period is diverse, the vertical difference is significant, elevation per liter 100 meters above sea level, precipitation increased by 20-40 mm, temperature decreased 0.55 ~ 0.6 ℃, rice growth period extended 2 to 3 days, the above characteristics constitute the extremely conducive to the occurrence and prevalence of rice blast in complex environmental conditions, a state rice Serious disease on the rice is a major obstacle to high yield. In order to do a good job of predicting and forecasting the disease in this area and improving the use of disease-resistant cultivars to prevent and control rice blast, in recent years, we have conducted research on physiological races of Magnaporthe grisea based on previous studies.