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１９９４～１９９６年结合稻瘟病的流行预报研究，对穗颈瘟进行系统调查，在水稻黄熟期，每块田采用平行跳跃式取样调查３０～３５丛，共计３００穗以上，逐穗记载病级，然后计算各块田普遍率和严重度。共调查不同发病程度的病田９５块。根据３ａ的水稻穗颈瘟普遍率（ｘ）...
From 1994 to 1996, we conducted a systematic survey of panicle blast in combination with the blast blasting study. During the ripening stage of rice, 30 to 35 plexuses were sampled by parallel jumping sampling in each paddy field for a total of 300 spikes or more, Then calculate the prevalence and severity of each field. A total of 95 disease cases of different incidences were investigated. According to 3a rice panicle blast prevalence rate (x) ...