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自北京,黑龙江等地采集呈萎蔫症状,或叶片具枯褐斑块的栽培及野生植株,用病组织保湿和分生孢子液划线法,从北京茄子、马铃薯、利马豆、菜豆、豇豆、茼麻、藜、葎草,黑龙江阿城、密山的茄子、黑龙江克山、河北坝上的马铃薯等上,都分离到了气生菌丝不发达、产生褐色厚膜孢子的轮枝菌。纯化四川棉花研究所微呈褐色的V.dahliae Kleb.菌株,也得到了相似的真菌。本文对不同来源的菌株作了详细研究,并根据形态、色泽、生长最适温度,30℃下生长情况、分布等,鉴定为V.nigrescens Pethybr.。这在中国是首次报道。有待进一步研究其致病性。
From Beijing, Heilongjiang and other places were wilt symptoms, or withered brown patches of leaves and cultivation of wild plants, with disease tissue moisturizing and conidial lines, from Beijing eggplant, potatoes, Lima beans, beans, cowpea , Hemp, quinoa, razorgrass, Heilongjiang Acheng, Mishan eggplant, Keshan in Heilongjiang, Hebei dam on the potato, etc., are isolated from the aerial mycelium underdeveloped to produce brown thick-walled spore rotten bacteria. Purified Sichuan Cotton Institute micro-brown V.dahliae Kleb. Strain, also obtained similar fungi. In this paper, strains from different sources were studied in detail, and identified as V. nigrescens Pethybr. According to the morphology, color, growth optimum temperature, growth and distribution at 30 ℃. This is the first time in China. To be further studied its pathogenicity.