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北京市通县种植小麦60万亩.近几年小麦散黑穗病的发生不断上升。据调查,1986—1990年,全县平均病穗率在0.05—0.07%之间,但1990年病穗率平均为0.10%,最高为0.45%,1991年为0.51%,最高为1.25%,1992年上升到1.22%,最高病穗率达5.48%。在调查中还发现,“农大146”、“京411”和“京437”等品种发病较重。在较干旱的田块和地头病株率较高。应尽快建立无病良种田,选留无病良种和采取药剂拌种等措
Beijing Tongxian 600,000 acres of wheat planted in recent years, the incidence of scattered smut of wheat continues to rise. According to the survey, from 1986 to 1990, the average disease rate in the whole county ranged from 0.05 to 0.07%. However, in 1990, the average rate of disease panicles was 0.10%, the highest was 0.45%, and in 1991 it was 0.51% and the highest was 1.25%. The annual rise to 1.22%, the highest disease rate of 5.48% ear disease. In the survey, it was also found that the diseases such as “Nongda 146”, “Jing 411” and “Jing 437” were more serious. In the more arid plots and land disease rate is higher. As soon as possible to establish a good disease-free farming, choose to leave disease-free elite and take agents such as seed dressing