At present, the vegetables in our city are mainly solanaceous, melon, and legume vegetables. Their growth period is at flowering - the result period. The total incidence of major diseases and insect pests was 3, which was comparable to the same period of last year. Due to the recent frequent rainfall, causing more waterlogging in vegetable fields, diseases such as epidemics and melons and downy mildews occur more severely.
Epidemics: Occurrence of tomato late blight and pepper blight. The degree of occurrence of the epidemic was grade 4 and was heavier than the same period of last year. According to the survey sites, the average diseased rate of tomato late blight was 10.8%, and that of the Yongchuan local plot was 25.7%. The average diseased rate of pepper disease was 6.4%, and the highest diseased plant rate was 18.2% in Shizhu District.
Downy mildew: cucumber downy mildew, loofah downy mildew, the occurrence of degree 3, compared with the same period last year, the average rate of diseased plants 13.3%, the highest diseased planted partial field block rate of 44%.
Beanie: Occurred mainly on kidney beans and green beans. The degree of occurrence was grade 1, which was lighter than the same period of last year. The average insect infestation rate was 2.6%, the average slug rate was 1.2%, and the highest slug rate of Xiushan local plot was 6.5%.
Pieris rapae and Plutella xylostella larvae: Occurred mainly on cabbage, with a degree of occurrence of 1 level, which was equivalent to the same period of last year. The average insect strain rate was 4%, and the highest strain rate of Wulong local block was 13.2%.
Red spider: Occurred mainly on beans, solanaceous vegetables, and melons. The degree of occurrence was Grade 1, which was lighter than the same period of last year. The average number of worms was 35.5, and the maximum number of tyloses in the local area was 201. .
Second, the next phase of the trend and prevention and control recommendations
According to various factors such as weather forecast in June-August, current occurrence of vegetable pests, and incidence of diseases and insect pests over the years, it is estimated that the total degree of occurrence of vegetables and insect pests in summer is grade 3 and local grade 4, including: epidemic disease and downy mildew The degree is 3-4, and the degree of occurrence of bean pod, red spider, diamondback moth, cabbage caterpillar and other pests is 2-3. The agricultural plant protection departments of all districts and counties must strengthen the monitoring of vegetable pests and diseases, release pest information in time, and guide farmers to prevent and control diseases. At the same time, it is necessary to strengthen the publicity and training of vegetable pest control technology, scientific safe and rational use of pesticides, and strictly prohibit the use of highly toxic and high-residue chemical pesticides. Prevention advice:
1. Diseases
Strengthen field management and remove diseased leaves or diseased plants in time. Control agent can be used: 72% Kelu wettable powder 600-1000 times liquid or 50% Anke wettable powder 2500 times liquid or 25% wettable powder 1000-1500 times liquid. Every 7-10 days, 2-3 times in a row.
2. Downy mildew
At the beginning of the disease, spray 72% cream urea manganese zinc wettable powder 500-600 times liquid or 58% dodecyl metalaxyl wettable powder 500-800 times liquid or 66.8% propiconzenium zinc phosphate wettable powder 500-700 Double fluid. Every 7-10 days, 2-3 times in a row.
3, bean soup
Clear the flowers in the field and fall out of time, and remove the wounded leaves and pods at any time. The control agent can be used: 52.5% poisonous chlorine emulsifiable concentrate 1000 times or 48% Lescott emulsion 1000 times or 1% abamectin emulsifiable concentrate 1000 times. Focus on spraying flower buds, tender pods, and floor-to-ceiling flowers. The time of application should be before 10:00 in the morning when the flowers are opened.
4, cabbage caterpillar, diamondback moth
Egg hatching to young larvae control, control agents can be used: 0.3% matrine water use mu 100-120 ml or 1.8% abamectin EC with 30-40 ml or 40% chlorpyrifos EC 60- 80 ml or 30% indox water dispersible granules were sprayed with 2.5-4.5 g watered.
5. Vegetable red spider
At the beginning of the occurrence, 22% of Avicin WP wettable powder can be used with 10.6-13.6g or 2.5% Lambda-cyhalothrin EC 13-35g/mu watered spray.
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