How to prevent and control sooty mold on wampee? These methods you need to master
How to prevent and control sooty mold on wampee? Please introduce Sooty mold on wampee is a common disease that occurs widely in wampee-producing areas in China, affecting the photosynthesis of plants and reducing yield. It affects economic development. Symptoms The disease occurs on leaves, and some branches, shoots and fruits are also affected. In the early stage of the disease, the surface of leaves and shoots will produce...
How to prevent and control sooty mold on wampee? Please introduce
Sooty mold on wampee is a common disease that occurs widely in wampee-producing areas in China, affecting the photosynthesis of plants and reducing yield. It affects economic development.
Symptoms
The disease occurs on leaves, and some branches, shoots and fruits are also affected. In the early stage of the disease, small mold spots appear on the surface of leaves and shoots, usually dark brown. As the disease develops, black mold covers the entire leaf surface, as if covered with a layer of soot, and the leaves curl and wither. When fruits are affected, the fruit surface is covered with a layer of black mold, reducing commercial value and affecting photosynthesis.
Occurrence pattern
The pathogen mainly parasitizes the secretions of aphids, scale insects and whiteflies, and is spread by wind, rain and birds. The peak incidence period is from May to June. This disease is prone to occur in orchards with severe damage by aphids, scale insects and other pests, extensive management, and shady and humid conditions.
Prevention and control methods
(1) Strengthen orchard management Apply more decomposed organic fertilizer, irrigate reasonably, enhance tree vigor, and improve tree disease resistance. Prune scientifically, cut off diseased and disabled branches and dense branches, regulate ventilation and light transmission, and pay attention to orchard drainage measures. Combined with pruning, clean up the orchard and reduce sources of the disease.
(2) Select more disease-resistant varieties according to local conditions.
(3) Prevent and control aphids and scale insects. In the early stage of the disease, spray 0.3%-0.5% lime Bordeaux mixture for control.
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