According to the national crop diseases and insect pests monitoring and reporting network survey and expert consultation analysis, affected by high winter temperature, high soil moisture and other factors, crop diseases and insect pests in 2017 showed a trend of recurrence, and the area of occurrence was expected to increase by 9.7% over the previous year.
The re occurrence of migratory pests is a great threat. The occurrence period of rice "two migration" pests was advanced and the generation number was increased. The occurrence area of rice planthopper was 27.5% higher than that of the previous year, and the occurrence area of rice leaf roller increased 26.6% in southeast coastal area, middle and lower reaches of Yangtze River and Yangtze River area along the Yangtze River. The results showed that the occurrence of oriental migratory locust, Tibetan migratory locust and Asian migratory locust continued to moderate and light, but high density locust damage might occur in some parts of the Yellow River, Yalong River and Jinsha River Valley .
The epidemic risk of air borne diseases is high. The results showed that wheat scab continued to be prevalent in the middle and lower reaches of the Yangtze River, the Yangtze River Huaihe River and the Huanghuai River, and the area needed to be prevented and controlled was basically the same as that of the previous year; wheat stripe rust was more prevalent in Jianghan Plain, Hanshui River Basin, southern, northwestern and southwestern parts of the Huanghuai River, with an increase of 31.3% over the previous year; rice blast existed in the southwest, Jiangnan, middle and lower reaches of the Yangtze River and Northeast China The incidence area of potato late blight increased by 20.0% compared with the previous year; potato late blight continued to focus on the epidemic in the east of southwest, north of northeast, north of North China and most of northwest, and the occurrence area was basically the same as that of last year. The rice false smut was seriously prevalent in the south of the Yangtze River, the middle and lower reaches of the Yangtze River and the north of Southwest China.
Frequent diseases and insect pests continued to recur. The results showed that wheat aphids were more serious or more serious in the main wheat producing areas of Huang Huai Hai, northwest and southwest of China, with an increase of 12.0% over the previous year; rice borers occurred more frequently in some rice areas in the south of the Yangtze River; rice sheath blight occurred more frequently in the south of the Yangtze River and the middle and lower reaches of the Yangtze River, the northern part of the southwest and the northwest of the Yangtze River The occurrence area of corn borer increased by 1.8% compared with the previous year; the occurrence of corn borer was more serious in the northeast, northwest and southwest, and moderate in most other corn producing areas, with an increase of 5.3% over the previous year.
We should carry out the work of the Ministry of agricultural diseases and insect pests prevention and control in order to reduce the damage caused by crop diseases and insect pests. First, strengthen monitoring and early warning. We organized 1030 regional stations for crop diseases and insect pests prediction in China, strengthened the monitoring and investigation in the source areas of diseases and insect pests, the transitional zones of migratory epidemics, and perennial recurrent areas, so as to accurately grasp the occurrence dynamics of diseases and insect pests, and timely release the forecast information and Prevention and control technology of diseases and insect pests. Second, strengthen green prevention and control. We will vigorously promote the green prevention and control technology mode based on physical control and biological control. Third, strengthen the rule of unified defense. Support crop pest control service organizations, relying on pesticide and pharmaceutical machinery production enterprises and new agricultural business entities, carry out technology integration, direct product supply and whole process service, and expand the coverage of integrated pest control. Fourth, strengthen scientific drug use. We will carry out the "training action on scientific drug use among the backbone farmers in 100 counties" to train and popularize the knowledge and skills of scientific drug use. Fifth, strengthen supervision and guidance. Establish and improve the prevention and control supervision and expert tour guidance system to ensure that the prevention and control measures are in place and the prevention and control technical measures are implemented in the field.