水稻纹枯病发病规律及防治技术研究

Study on the Occurrence Pattern and Control Techniques of Rice Sheath Blight

摘要:

针对近年来吉林省水稻纹枯病日益严重的现象，本研究对公主岭地区水稻纹枯病的发生动态进行了定点调查及防治技术研究。结果表明，7月中上旬为水稻纹枯病的始发期，8月上旬为爆发期，8月中下旬为病情稳定期，但年度间存在一定的差异。通过室内抑菌试验筛选出6种抑菌效果较好的药剂，进一步开展田间防效试验，其中吡唑醚菌酯和苯甲·嘧菌酯在田间表现出较好的防治效果，平均防效分别为81.93%和75.13%。水稻纹枯病发病规律及防治技术的研究，为吉林省水稻纹枯病的有效防治提供了科学依据。

Abstract:

To address the increasingly severe incidence of rice sheath blight in Jilin Province in recent years, this study conducted a fixed-point investigation of the disease's epidemiology and researched its management strategies in Gongzhuling. The results indicate that the initial occurrence period of rice sheath blight occurs in early to midJuly, with the disease peaking in early August. The disease reaches a stable state in mid to late August. However, it is noted that these timings can vary from year to year. Six agents showing significant inhibitory effects were selected through in vitro antimicrobial assays. The field efficacy trials demonstrated that pyraclostrobin and benzovindiflupyr effectively controlled rice sheath blight, achieving control efficacies of 81.93% and 75.13%, respectively. This study on the occurrence pattern and control techniques of rice sheath blight provides a scientific basis for its effective management in Jilin Province.