What special-effect fungicide works well for celery leaf spot disease

Celery is a common vegetable in daily life, and it is grown in many regions. During celery cultivation, the phenomenon of spots appearing on the leaves occurs. So what special-effect fungicides for celery leaf spot disease are there?

1. What special-effect fungicides are there for celery leaf spot disease?

The special-effect fungicides for celery leaf spot disease include thiophanate-methyl suspension concentrate, carbendazim wettable powder, Fangmeibao ultra-fine wettable powder, copper oxychloride suspension concentrate, and Ludebao suspension concentrate, etc. Generally, at the early stage of the disease, 30% copper oxychloride suspension concentrate at 800 times dilution, 36% thiophanate-methyl suspension concentrate at 500 times dilution, 50% carbendazim wettable powder at 600 times dilution, or 60% Fangmeibao ultra-fine wettable powder at 800 times dilution can be diluted with water and sprayed.

2. How is celery leaf spot disease prevented and controlled?

1. Use disease-free seeds and treat the seeds before sowing. For seed treatment, the seeds can be soaked in warm water at 55 degrees C for 15-20 minutes, then sown after cooling, or treated with 47% kasugamycin · copper hydroxide wettable powder at 3‰ of the seed weight.

2. Strengthen field management. After rain, standing water in the field should be drained promptly. For greenhouse production, attention should be paid to ventilation and dehumidification to reduce dew formation on leaves and stems. Pay attention to early pest control, and diseased plants should be pulled out promptly when the disease first occurs.

3. Implement crop rotation of more than two years.

4. Plant at a reasonable density, thin seedlings and weed in a timely manner, pay attention to ventilation and light penetration, reduce field humidity, and strictly prohibit flood irrigation; apply more organic fertilizer, and topdress and water in a timely manner to promote robust plant growth and enhance plant disease resistance.

5. Immediately after harvest, remove diseased plant residues and burn them in a centralized manner or bury them deeply.

6. Chemical control. Spray fungicides at the early stage of the disease. You can choose 50% carbendazim wettable powder at 600 times dilution, or 50% thiophanate-methyl wettable powder at 600 times dilution, or 70% mancozeb wettable powder at 500 times dilution, or 75% chlorothalonil wettable powder at 600 times dilution, or 12% green copper emulsion at 400 times dilution, spraying once every about 7-10 days, for 2-3 consecutive times.