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我区地处江汉平原,河流湖泊星罗棋布,地下水位高,湿度大,在棉花苗期,常常遇到寒潮和连阴雨,以致棉苗烂根死苗极为严重,常年棉苗根病率达30—70％,死苗7.5—20％,严重的死苗缺窝达30％以上。因此,棉苗根病是我区棉花一播全苗、壮苗早发、夺取高产的一大障碍。以往我区群众预防棉苗根病多用有机汞类农药处理棉种,防病效果虽较明显,但是使用汞制剂农药又出现了污染问题。为了解决这一问题,我们从1972年起在现有农药中试图找出代替汞制剂处理棉种的药剂。我们采取小区对比试验和
My area is located in the Jianghan Plain, rivers and lanes dotted, groundwater level is high, humidity, cotton seedlings, often encounter cold and even the rain, resulting in cotton seedlings rotten root dead seedlings is extremely serious, perennial cotton seedling root disease rate of 30-70 %, Dead seedlings 7.5-20%, severe dead seedling nest up to 30% or more. Therefore, cotton seedling root disease is a broadcast of cotton seedlings in our region, strong seedlings early hair, a major obstacle to winning high yield. In the past, people in our area to prevent cotton seedlings root disease with organic mercury pesticides to deal with cotton varieties, although the prevention effect is more obvious, but the use of mercury pesticides and pollution problems. In order to solve this problem, we started from 1972 on the existing pesticides to find out the agents to treat cottonseed instead of mercury preparations. We take cell contrast test and