Symptoms: Gray mold is mainly harmful to grape spikes and fruits, and sometimes to leaves and shoots. When the fruit is infected with gray mold at the near maturity, it will first produce a light brown depressed spot, which will spread the whole fruit and cause the fruit to rot. Moreover, the grape can also be infected with gray mold during the storage period, causing the berry to change color and rot, sometimes in the fruit stalk. The surface produces black sclerotia. Botrytis cinerea is more likely to occur in vineyards with extensive management, insufficient phosphorus and potassium fertilizers, mechanical injuries, and insect damage.
Control methods: 1. The cultivated grapes in the garden should be selected for breeding with strong disease resistance, and strengthen the management of the garden during the growth period, and maintain the smooth drainage work, so as to avoid the accumulation of water after the rain can not be discharged in time to cause moisture retention and high disease. 2. Timely scaffolding, tying the vines to protect the grapes, maintaining sufficient ventilation and light transmission between the gardens; and timely spraying the intelligent control foliar fertilizer can inhibit the phenomenon of branching madness, enhance the fruit expansion, avoid the phenomenon of leaf hypertrophy, and improve the field Permeability. 3. Strengthen the inter-environmental cleaning measures, timely remove the weeds in the garden, remove the diseased leaves, diseased flowers, diseased fruits and lower yellow leaves, old leaves, etc., and concentrate them to the park to be buried or burned to reduce the gray mold in the garden. The source of disease infection. In time, before the occurrence of gray mold, or in the early stage of the disease, the targeted general agent and the general manager of the tree will be sprayed to prevent and control. The virus can be quenched in the germination stage, enhance plant resistance and immune positive energy, and protect the healthy growth of the grape.
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