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以早杂组合协优４９为供试材料，应用井冈霉素药剂防治，明确了杂交早稻纹枯病一次防治以始穗期为最佳，在常年病害流行年份，不必进行二次防治（而江西省常规早稻一次防治以孕穗初期为最佳，常年需进行二次防治）。文末就杂交早稻与常规早稻纹枯病防治适期从病害流行特点和产量损失生理方面进行了比较和讨论，指出，从农业生产实际考虑，可把早杂纹枯病的防治适期定为孕穗末期至始穗期。
The early hybrid combination of Xieyou 49 as the test material, the application of Jinggangmycin agents prevention and control, clear hybrid rice sheath blight early prevention and treatment of the beginning of the earliest stage of the disease epidemic year, without secondary prevention and control (and Jiangxi Provincial conventional early rice once the booting early prevention and treatment for the best, perennial need for secondary prevention and control). At the end of this paper, we compared and discussed the characteristics of pest prevalence and yield loss physiology during the early stage of control of hybrid rice and conventional rice sheath blight. It was pointed out that from the practical point of view of agricultural production, End to the beginning of the ear.