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我县1984年小麦纹枯病发生面宽,危害损失重。据全县10个区的典型调查推算,发病面积达9.6万亩,占播种面积的40％以上,损失小麦160多万斤,占全年小麦病虫总损失的52.9％。部分坝区村、组,发病面积占95％以上,平均病株率达71.6％,高的达90％以上,平均茎腐死苗率达6.03％,严重的高达27％,致使有效穗减少,结实率、千粒重下降,纹枯病是影响我县1984年小麦单产的重要原因之一。通过小区试验和大面积的病情调查,初步看出: 一、目前我县种植的小麦
In 1984, the occurrence of wheat sheath blight in our county was wide and the damage was heavy. According to a typical survey of 10 districts in the county, the disease area reached 96,000 mu, accounting for more than 40% of the sown area, losing more than 1.6 million kilograms of wheat, accounting for 52.9% of the total annual wheat pest losses. In some dam areas, the incidence area accounted for 95% or more, the average disease strain rate reached 71.6% and the height reached above 90%. The average rate of stalk rotting was 6.03% and the severity was as high as 27% Seed setting rate, grain weight decreased, sheath blight is one of the important reasons that affected my county 1984 wheat yield. Through cell testing and large area disease survey, initially seen: First, the current planting of wheat in our county