水稻是仪陇县的第一大粮食作物,常年种植面积33.4万亩,总产1700万kg左右。稻瘟病是该地水稻生产上的常发病害,受品种、菌源量及气候等因素影响,该地稻瘟病长时间保持在较高发病水平,近5年年度间发病面积比12.8%～45.7%,自然损失率10.2%～ Rice is the largest grain crop in Yilong County, with an annual planting area of ​​334,000 mu and a total output of 17 million kg. Rice blast is the most common disease in this area, which is influenced by variety, amount of bacteria, climate and other factors. The rice blast maintained at a relatively high level for a long period of time. The incidence of disease in the recent 5 years was 12.8% ~ 45.7 %, The natural loss rate of 10.2% ~