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谷子白发病在晋东南地区每年都有发生,一般发病株率5%左右,有的田块有的品种达10—15%。以往多用药剂拌种、温汤浸种和拔除病株等方法防治,但未能控制为害。1981年冬,我们在温室用新农药瑞毒霉作了拌种防治试验,防治效果显著,1982年在陵川县附城公社大面积进行示范。一、试验方法与结果试验田设在省农科院谷子所大田,供试品种为感病的长农12号,药剂为含有效成份35%的瑞毒霉.用量分别为种子量的0.3%、0.5%、0.7%.共设13个处理,每处理4行,行长2米.锄开沟播种.随机排列,重复3次。全部拌菌并覆盖菌土.每行用菌量为0.5克白发病卵孢子粉.5月16日播种,9月13日调查(见表1):
Mildew white hair disease occurs every year in southeastern area of Shanxi, the general incidence of about 5% of the plant, and some fields of some varieties up to 10-15%. In the past, multi-agent dressing, warm soup soaking and diseased strains and other methods of prevention and treatment, but failed to control the damage. The winter of 1981, we in the greenhouse with new pesticides ratoon mold made seed dressing control test, prevention and treatment of significant effect, in 1982 Lingchuan County Fucheng commune large area demonstration. First, the test methods and results Experimental field located in the provincial Academy of Agricultural Sciences millet fields, the test varieties for the disease of Changnong 12, the agent containing 35% of the effective ingredient of the genus Rysiostomies were 0.3% of the amount of seeds, 0.5%, 0.7%. A total of 13 processing, each processing 4 lines, 2 meters long. Hoe ditch sowing. Random arrangement, repeated 3 times. All mixed with bacteria and cover the soil.Using 0.5 grams of bacteria per trip for white hair oospores. May 16 sowing, September 13 survey (see Table 1):