不同栽培方式对水稻纹枯病控制效果试验

分别在水稻分蘖盛期、孕穗末期—黄熟期进行点播、撒播、强化栽培、插植、抛秧等5种栽培方式下稻田纹枯病病害情况调查。结果表明,点播、撒播稻田纹枯病发生程度较轻;抛秧稻田发病程度与插秧稻田相当;强化栽培稻田纹枯病发病率和病情指数比其他栽培方式的高。因此,强化栽培方式种植水稻更要做好纹枯病的预防工作,做到适时用药,合理安排种植密度,以达到控制该病害的目的。

Evaluation of cultivation methods for control effect of rice sheath blight disease

The present study has been conducted to evaluate the efficacy of various planting methods on controlling the rice sheath blight disease.The planting methods included hill seeding,broadcasting,strengthening-cultivation,seedling transplantation and seedling throw cultivation.The study was performed using the rice variety Teyou 649 and the effects were observed at active tillering stage and later booting–yellow ripe stage.Results showed slight degree of disease in rice cultivated using hill seeding and broadcasting methods.While,the degree of disease in seedling throwing method as well as in seedling transplantation method was moderate.The disease incidence and disease index in strengthening-cultivation method were more severe than that of other cultivation methods.Therefore,forehanded medication,reasonable planting density are important to properly control rice sheath blight disease under field conditions.