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1981—1984年自河南省10个地区21个县市共搜集小麦白粉菌标样131个,经过室内苗期鉴定,并结合异地苗期、成株期观察,结果表明:小麦白粉菌生理分化十分显著,初步测定出我省有16个小种,其中以“O”号小种分布”最广,出现频率最高(25.19%),致病性最强,能侵染我省许多主栽品种,如百农3217.宝丰7228,郑引1号,7023,阿夫,宛18—3,开封10号和周口7860等,是我省的优势种.其次为“62”号和“30”号小种,其出现的频率分别为16.03%和14.50%.
A total of 131 samples of wheat powdery mildew were collected from 21 counties in 10 districts of Henan Province from 1981 to 1984. The results showed that the physiological differentiation of wheat powdery mildew was very high Significantly, the initial determination of the province has 16 races, of which “O” races are the most widely distributed, the highest frequency (25.19%), the most pathogenic, capable of infecting many of the main varieties in our province, Such as 100 Nong 3217. Baofeng 7228, Zheng cited No. 1, 7023, Avf, Wan 18-3, Kaifeng No. 10 and Zhoukou 7860, etc., is the dominant species in our province, followed by “62” and “30” Race, its frequency of occurrence was 16.03% and 14.50%.