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利用从西北地区分离的２０ 个全蚀病菌（ Ｇａｅｕｍａｎｎｏｍｙｃｅｓ ｇｒａｍｉｎｉｓｖａｒ．ｔｒｉｔｉｃｉ） 菌株，对小麦全蚀病菌生物学特性及７ 种禾本科作物致病性进行了研究。结果表明，该菌能在５ ～３３ ℃、ｐＨ４．０ ～１０．０ 范围内生长。在３ ℃或３５ ℃时，所有菌株停止生长。大多数菌株在２０ ～２５ ℃、ｐＨ６．０ ～８ ．０ 条件下生长良好，当２５ ℃、ｐＨ７ ．０ 时菌落生长速度最快。对７ 种禾本科作物的致病性测定结果表明，２０ 个菌株均对小麦致病性最强，其次是高粱、糜子和水稻。一些菌株还能轻度侵染谷子、燕麦和玉米。试验结果表明，不同菌株的培养特性和致病性存在明显差异，生长较快的菌株较生长慢的菌株致病性强。同一地区可以同时存在几种生物学特性不同的菌株
By using 20 strains of Gaeumannomyces graminisvar.tritici isolated from Northwest China, the biological characteristics of the total eclipses of wheat and the pathogenicity of 7 gramineous crops were studied. The results showed that the bacteria can grow at 5 ~ 33 ℃, pH4.0 ~ 10.0. All strains stopped growing at 3 ° C or 35 ° C. Most strains at 20 ~ 25 ℃, pH6.0 ~ 8. 0 conditions, good growth, when 25 ℃, pH7. 0 colony growth fastest. The results of pathogenicity test on seven kinds of gramineous crops showed that all 20 strains were the most pathogenic to wheat, followed by sorghum, millet and rice. Some strains also lightly infect millet, oats and corn. The results showed that there were significant differences in the culture characteristics and pathogenicity of different strains. The strains with faster growth were more pathogenic than those with slower growth. In the same area, several strains with different biological characteristics may exist at the same time