今年我省主要病虫发生总趋势:属偏重年份。大多数病虫发生期稍有推迟,发生量相当于去年,分布面较广。预计稻纵卷叶螟、稻飞虱、纹枯病、稻瘟病、棉红蛉虫、棉叶蝉、棉红蜘蛛等将发生较多,为害较重,但三化螟发生偏轻,主要依据: 1.病虫基数:据各地调查,纹枯病冬后田间菌核残存量一般每亩15—20万粒、多的 This year, the main trend of the occurrence of pests and diseases in our province: the emphasis is on the year. The majority of pests and diseases occurred slightly postponed, the occurrence of the equivalent of last year, a broader distribution. The occurrence of rice leaf roller, planthopper, sheath blight, rice blast, cotton red pinworm, cotton leafhopper and cotton spider mite are expected to be more serious, but the occurrence of rice stem borer is relatively light, mainly based on : 1. Pest base: According to local surveys, sheath blight winter sclerotia residual 15-20 million per acre, and more