The major diseases and insect pests of autumn and winter vegetables include gray mold, downy mildew, powdery mildew, and diseases. The following briefly describes several chemical control measures:
1, soft rot disease disease strains should be promptly removed, apply appropriate amount of lime disinfection, use agricultural streptomycin or neophytin 4000 times, or 77% can kill wettable powder 600-800 times liquid spray, etc. Spray once every 7-10 days, spray 2-3 times.
2, gray mold: In case of cloudy days, smoke agents should be used to prevent, such as chlorothalonil, fast-king. It can also be sprayed with 600 to 800 times Trickle. Can also be used 10% World High Water Dispersant 1500 times, 40% Shijiale suspension agent 800 ~ 1200 times liquid spray. Pay attention to clear the diseased fruit.
3, powdery mildew: spray protection of plants, can spray 27% high fat film 100 times or 80% chitin 6000 times. At the beginning of the disease, 10% of the world's high 1500 times fluid, 40% of Fuxing's EC 8000 times fluid, etc. are used for rotation, and they are continuously treated 2 to 3 times with an interval of 5 to 10 days.
4, disease: Prevention can be used 10% Kejia 1500 ~ 2000 times fluid 2 ~ 3 times. Onset of drug use, can be used 52.5% fast net 2000 times faster or 69% manganese manganese zinc 600 times, 5 to 6 days, once every 2 to 3 times. Remove serious diseased plants and bring them deep outside the shed. Limes are disinfected in the sick holes.
5, leaf mold: prevention of available smoke agents, such as 45% chlorothalonil 250 ~ 300 g / acre. Spray can be used 10% of the world's high water dispersible granules 1000 times, 2% Wuyimycin aqueous solution 150 times, 40% Fuxing 6000 times, or thiophanate-methyl, Garrinone, pay attention to the leaves carrying drugs, 7 Once in 10 days, use 3 times.
6, celery leaf spot and spot blight: when disease occurs with 85% trichloroisocyanuric acid soluble powder 1000 ~ 1500 times liquid control.
7. Viral disease: Occurs in the early stages, mainly treating phlegm, reducing the transmission of viral vectors. In the early stage of disease, 20% of the virus A500 times or 1.5% of the diseased planting spirit is sprayed 1000 times, once in 7-10 days, and sprayed 2-3 times.
In addition, when the leaf spot rate of Liriomyza sativae Blanche is high, it can be treated with 1.8% Avermectin EC 3000 times.
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