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江汉平原春季雨水多,田间湿度大,棉花苗期病害较为突出,主要有为害根茎的炭疽病、立枯病,其次有为害苗叶的红腐病、疫病等,常造成缺苗断垄。进行棉花药剂拌种防病是促进棉花壮苗早发、正常生长的基础措施之一。近年来,随着一些新农药的推广应用,棉农对其防效认识不足,反映不一,为此,1987年笔者对已经推广和正在推广的几种农药拌种防病效果进行了对比试验调查,现报道如下,以供广大棉农和有关部门参考。 材料与方法 1.拌种农药名称及浓度:20%稻脚青,拌种浓度为0.5%;种衣剂3号(主含成分
Spring in Jianghan Plain is heavy in rainy season with high humidity in the field. The disease of cotton is more prominent at seedling stage. There are anthracnose and blight which are the root of rhizome and secondly the red rot and blight of the damaged seedling leaves. Cotton seed dressing disease prevention is to promote cotton seedlings early onset, one of the basic growth measures. In recent years, with the popularization and application of some new pesticides, cotton farmers have not enough understanding of their control effects. Therefore, in 1987, the author conducted a comparative investigation of the preventive and control effects of several pesticide seedings that have been promoted and being promoted Now reported below, for the majority of farmers and relevant departments for reference. Materials and methods 1. Name and concentration of pesticide seed dressing: 20% rice toad, seed dressing concentration 0.5%; Seed coating No. 3 (main ingredient