论文部分内容阅读
1 小麦据13个省、市、区统计,今年小麦病虫害发生面积7亿亩次,属中等偏轻发生年。其中病害发生面积3亿亩次,除小麦纹枯病外其他病害均轻发生,虫害发生面积4亿亩次,麦蚜、麦蜘蛛、吸浆虫均为中等发生年.小麦条锈病发生421万亩,为轻发生年。条锈病常发区湖北省仅在荆州地区局部田块见病,后期也未能流行,越夏基地甘肃省发病面积170万亩,是1991年发生面积的10%。小麦白粉病发生面积7832万亩,轻于去年,发生期偏晚,病指低,为害程度较轻。小麦赤霉病发病面积3867万亩,与常年相似。赤霉病今年主要在江淮流域、陕西关中地区发生,江苏、湖北为中等偏轻年,四川为偏重发生年,发生面
1 Wheat According to statistics of 13 provinces, cities and districts, the area of wheat diseases and insect pests this year is 700 million mu, which is a moderately-mild year. Among them, the disease area was 300 million mu, except for wheat sheath blight, other diseases were all occurred lightly, with pest occurrence area of 400 million mu, wheat aphid, wheat spider and midge, For the light year. Strikingly endemic areas of Hubei Province in Hubei Province only see the disease in the local plots of Jingzhou, late also failed to epidemic, the incidence area of more than 1.7 million mu of Gansu Province in summer base, is 10% of the area occurred in 1991. Occurrence of wheat powdery mildew area of 7832 mu, lighter than last year, the occurrence of late, disease index is low, less harmful. Focal area of 3867 mu of wheat scab, similar to perennial. Fusarium head blight occurs mainly in the Yangtze River and Huaihe River valleys and Guanzhong area of Shaanxi Province in this year. Jiangsu and Hubei are medium-to-light years while Sichuan is the most heavily-affected area.