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漳州中国水仙(Narcissus tazetta varchenensis Roem)是我省名贵花卉之一,每年均有出口,换取相当数量的外汇.近些年来种植面积逐年扩大,在生产上发生的大褐斑病害也日趋严重,直接影响水仙的产量和质量.为了查清该病害的致病病原,为防治提供依据,笔者于1980年以来,进行了水仙大褐斑病害的调查,以及分离、接种和鉴定实验,现报道如下.一、病状及危害据田间观察,该病发生于1月下旬至2月中旬,先是叶片或花梗上出现不规则铁锈小斑,随后扩大,横径可达0.5～1.2厘米,长径可达2.5～5.1厘米,呈纺锤形褐色坏死斑,病斑明显增厚,两端沿叶脉扩展,使叶片变黄致死.病叶上的分生孢子随风雨传播,感染邻近
Narcissus tazetta varchenensis Roem is one of the rare flowers in our province and it is exported every year in exchange for a considerable amount of foreign exchange.Accumulation of the area has been expanding year by year and the occurrence of major brown spot diseases is also becoming more and more serious Affecting the yield and quality of narcissus.In order to find out the pathogenic pathogen of the disease and provide the basis for prevention and treatment, the author carried out the survey, the isolation, inoculation and identification experiment of narcissus big brown spot disease since 1980, and the report is as follows. First, the symptoms and hazards According to field observations, the disease occurred in late January to mid-February, first leaves or peduncles irregular rust spots appear, then expand, the diameter of up to 0.5 to 1.2 cm, the long diameter up to 2.5 ~ 5.1 cm, was spindle-shaped necrotic necrosis, lesions significantly thicker, extending along the veins at both ends, the leaves turn yellow to death. Conidia on sick leaves spread with the wind and rain, the infection in the vicinity