花生叶斑病在我区发生普遍,危害严重。一般因病减产10—20％,严重达30％以上。为了有效地控制叶斑病的危害,提高花生产量,全区自1974年开始对该病进行了系统观察和试验,并开展了大面积试验示范和推广工作,取得了显著的防病增产效果。 一、防病效果及增产原因分析 近几年,花生叶斑病越来越重。1981年全区发病面积达338万亩,占播种面积 Peanut leaf spot disease occurs in my area is widespread, serious harm. The general cut 10-20% due to illness, severe up to 30%. In order to effectively control the damage of leaf spot disease and improve the yield of peanut, the whole area has systematically observed and tested the disease since 1974, carried out large-scale experimental demonstration and popularization work, and achieved remarkable effect of increasing disease prevention and yield. First, the effect of disease prevention and analysis of yield increase In recent years, peanut leaf spot disease is more and more heavy. In 1981 the disease area of ​​338 mu, accounting for sown area