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小麦根腐病(Helminthosporium sativum P.K.et B)又名黑胚病,主要发生于东北、华北、西北、内蒙等地。带菌种子播种后,往往造成缺苗或幼苗弱,影响小麦正常生长发育。过去用赛力散等汞制剂拌种。汞制剂禁用以后,五氯硝基苯、菲醌、六氯苯等药剂虽可代替赛力散用于防治小麦腥黑穗病、秆黑穗病等;但试验证明这些药剂解决不了根腐病问题。1972—1979年期间我们针对根腐病,用了二十多种杀菌剂进行室内、外筛选试验,从中得出几种有希望的药剂。 在培养基上抑菌试验 每一培养皿中倒入25毫升马铃薯洋菜蔗糖培养基,凝固前将稀释好的小麦根腐病菌
Wheat root rot (Helminthosporium sativum P.K.et B), also known as black embryo disease, occurs mainly in the northeast, north, northwest, Inner Mongolia and other places. After sowing seeds with bacteria, often resulting in lack of seedlings or seedlings, affecting the normal growth and development of wheat. In the past, Saracenic and other mercury preparations seed dressing. After the banning of mercury preparations, the drugs such as PCNB, phenanthrenequinone and hexachlorobenzene can be used to replace wheat flourheads and stalk smut instead of saxifen; however, the tests prove that these pesticides can not solve the root rot problem. From 1972 to 1979, we used more than 20 kinds of fungicides for indoor and outdoor screening tests against root rot to draw several promising pharmaceuticals. Bacteriostatic test in culture medium Pour 25 ml of potato oxysugar culture medium into each dish and dilute the diluted root rot fungi