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从稗草病株上分离到一尖角突脐孢菌。对该菌生物学特性的研究表明,其菌丝生长的适宜温度为25～32℃,最适温度为30℃,最适pH为4～6,对光照无要求;碳、氮、磷和硫等元素是该菌菌丝体生长的必需元素,钾和镁对菌丝体的生长有极大的促进作用,加入少量的铁和锌对菌丝生长有利,铜元素抑制该菌的生长;缺碳和氮素明显影响菌落的生长。该菌生长最合适的速效碳源是葡萄糖,缓效碳源是玉米粉,最适无机氮源是硝酸铵,最适有机氮源是酵母粉;分生孢子萌发的适合温度范围为20～30℃;分生孢子快速萌发的酸碱条件为初始pH4～7,最佳初始pH值为5;光照不利于分生孢子快速萌发。
A strain of C. cercidiptera was isolated from the barnyardgrass. The study of the biological characteristics of the strain showed that the suitable temperature for mycelial growth was 25 ~ 32 ℃, the optimum temperature was 30 ℃, the optimum pH was 4 ~ 6, no requirement for light; carbon, nitrogen, phosphorus and sulfur And other elements are essential elements of the mycelium growth, potassium and magnesium on the growth of mycelium has a great role in the promotion, adding a small amount of iron and zinc on mycelium growth, copper inhibition of the growth of the bacteria; Carbon and nitrogen significantly affect the growth of colonies. The best available carbon source for the growth of the bacteria is glucose, the slow-acting carbon source is corn flour, the best inorganic nitrogen source is ammonium nitrate and the optimum organic nitrogen source is yeast powder. The suitable temperature range for conidial germination is 20-30 ℃. The optimum conditions of pH and pH for conidiospore germination were initial pH 4 ~ 7 and optimum initial pH value of 5, respectively. The illumination was not conducive to rapid germination of conidia.