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水稻是陕西省平利县第二大粮食作物,常年因病虫草害造成减产,丰产不丰收,个别年份个别田块甚至颗粒无收。根本原因是受气候的影响,以及施肥水平的提高、优质稻的大面积推广等栽培制度的改变,生态环境发生变化,使有害生物危害更加多样化,加重病虫草害猖獗危害,一些七八十年代的次要害虫逐渐上升为主要病虫害,直接威胁水稻生产,往往单凭化学防治顾此失彼、形成恶性循环.结果是越防越厉害。因此,开展水稻病虫草害综合防治是有效控制病虫草危害.确保水稻高产.稳产的重措施。
Rice is the second largest grain crop in Pingli County, Shaanxi Province. The annual output of paddy rice is reduced due to the diseases, pests and weeds, and the high-yielding yield does not increase. Individual paddy pieces or even grains are not collected in individual years. The fundamental reason is that due to the influence of climate and the improvement of fertilization level and the large-scale popularization of high-quality rice, the ecological environment has changed so as to make pests more diversified and aggravate the rampant harm of pests and weeds. Some seventy-eighty The minor pests of the age gradually rose to the major pests and diseases, which directly threatened the rice production. Therefore, chemical prevention and control often led to the vicious circle, resulting in a vicious circle. Therefore, it is an effective measure to control the disease, pest and weed to carry out the integrated control of diseases, pests and weeds in rice so as to ensure high yield and stable yield of rice.