First, the degree of occurrence: mid-year rice leafhoppers are moderately heavy, and hilly and mountainous areas are obviously heavier than the plains.
Second, the epidemic and prevention period: acute lesions onset on June 25, Daejeon epidemic June 30-July. Prevention period June 20-30.
Third, the main basis
1. Large amount of bacteria in the field and broad field incidence: On June 15th, the plant protection station observation point survey, Datian mainly with acute lesions, the diseased field rate was 100%, and the disease leaf disease rate was 0.81%, of which acute disease Leaves account for 90%. In the hilly rice areas of the pre-miao and Wangdian districts, there are “fire pits†plots.
2, climatic conditions: when the weather is fine, heavy fog in mountainous areas, the invasion of pathogenic bacteria spread, leading to disease damage.
3. The disease resistance of the rice varieties planted this year varies greatly, and there are many susceptible varieties.
4. Rice fields are dominated by inorganic fertilizers. Early seedlings and tender seedlings are easily induced by epidemics.
Fourth, comprehensive defense advice
1. Prevention and control strategy: The middle rice leafhoppers are mainly for prevention, grasping the prevention and control at the early stage, and controlling the invasion and spread of diseased seedlings.
2. Strengthen water and fertilizer management: Rational fertilization, control of water, control of seedlings, and reduction of field humidity. (Hubei Dangyang Agricultural 110 Service Center)
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