As spring and summer turn, the temperature rises and the rainfall gradually increases, which provides favorable conditions for the growth of various fruit crops, but it is also easy to induce various diseases, such as black spot, ring rot, downy mildew, anthracnose, scab, etc. In order to solve these diseases, it is particularly important to do a good job of prevention and control.

1. Black spot is a plant disease . It can overwinter in diseased remains or fallen leaves in the soil, and spread by rain splashes or wind. In the early stage, 75% mancozeb wettable powder can be evenly sprayed for prevention and control, or 50% carbendazim wettable powder can be used for treatment.
2. Ring rot mainly harms stone fruit trees such as apples, peaches, and plums. 25% prochloraz EC has strong systemic properties and is suitable for spraying in the early stages of the disease. 50% carbendazim WP and 25% tebuconazole EC can both play a preventive and therapeutic role, and the efficacy is long-lasting.
3. Anthracnose is mainly caused by pathogens of the genus Colletotrichum, which is extremely harmful to fruits and vegetables, causing leaves to dry up and fruits to rot and fall off. The prevention and control measures for this disease are mainly “early prevention, rotation of drugs, and comprehensive management.” 25% prochloraz EC can provide effective treatment and protection during the fruit ripening period.
4. Scab is a common fungal disease that occurs widely in crops such as apples, pears, citrus, and potatoes. Scab is prone to occur under high humidity and heavy rainfall conditions. Early prevention and comprehensive management strategies should be adopted, and prevention and control should be carried out during the budding stage, leaf expansion stage, and within two weeks after flower drop. Thiophanate-methyl (50% wettable powder) and difenoconazole (25% suspension) have good control effects on scab.
5. Downy mildew is a serious oomycete fungal disease that often occurs on fruits, vegetables and cash crops. The disease is prone to occur in high humidity and low temperature environments, which can quickly lead to leaf necrosis, crop yield reduction, and even crop failure. Dimethomorph (25% suspension), cymoxanil hydrochloride (8% wettable powder) and copper hydroxide (77% wettable powder) are all effective in inhibiting and treating downy mildew.

Agricultural prevention and control measures

In terms of pesticide application, using 80% mancozeb wettable powder when plants first sprout can effectively control early fungal infections. Using a combination of thiophanate-methyl and azoxystrobin or epoxiconazole and trifloxystrobin during the growing season can effectively improve the broad-spectrum and lasting effect.In terms of agricultural governance, we need to take the following measures: