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近年来,稻曲病[Ustilaginoidea virens (Cke.) Tak.]在我区发生面积不断扩大,危害日趋严重,一般田块穗发病率2—5％,严重田块达40—68.2％.不仅造成减产,而且谷米受污染,病菌在代谢过程中产生C_9H_7O_6的有色毒素及一种类似麦角碱的生物碱,人畜误食多时会发生中毒,故稻曲病的发生已成为水稻生产上一个突出的问题。1989年,笔者对该病进行了室内药剂筛选,田间小区防治试验以及大面积防治示范,找到了适于防治稻曲病的有效药剂、浓度及施药适期。
In recent years, the area of Ustilaginoidea virens (Cke.) Tak.] Has been expanding in our district, which has become more and more serious. Generally, the incidence of spikes is 2-5% in fields and 40-68.2% in severe fields. Production and pollution of rice, the bacteria in the metabolism of C_9H_7O_6 produced a toxin and a similar alkaloid alkaloids, human and animal poisoning occurs often, so the incidence of false smut has become a prominent rice production problem. In 1989, the author carried out indoor pharmacy screening of the disease, field plot prevention and control experiments and large-scale prevention and control demonstration, and found suitable for the control of False smut effective agents, concentrations and application period.