What to do about grape yellow leaf disease
Today, we will introduce how to deal with grape yellow leaf disease and related knowledge about its treatment methods. Next, the editor will provide you with detailed answers.
Grape yellow leaf disease requires targeted treatment. During the growing period, you can spray appropriate amounts of bactericides such as benzalkonium chloride to prevent and control the disease, which has the effect of killing bacteria and insects, preventing the later infection of yellow leaf disease. If some parts have already turned yellow, spray ferric sulfate solution in time for treatment. Improve the soil acidity and alkalinity, as alkaline soil affects the absorption of iron by the plant, which can lead to yellow leaves. Manage the garden well, supplement nutrients to strengthen the tree's vitality, thoroughly clean the garden in winter to prevent diseases in the following year. Let's take a detailed look at aspects such as spraying pesticides, improving soil, and garden management.
1. Spraying Pesticides
During the growing period, prevent and control yellow leaf disease by appropriately applying bactericides like benzalkonium chloride and mancozeb. Preventing insect pests can also effectively prevent the later infection of yellow leaf disease. When applying other pesticides, control the concentration and dosage to avoid causing phytotoxicity. When yellow leaf disease occurs, spray ferric sulfate solution for treatment, applying once every 7-40 days, for 2-3 consecutive times.
2. Improving Soil
Soil that is too alkaline, or saline-alkaline land, can easily lead to yellow leaf disease. Also, be mindful of the salinity of the water when watering. In alkaline soil, plants cannot absorb iron normally, and even if iron is supplemented through fertilization, it will convert to insoluble iron and cannot be absorbed. Therefore, it is necessary to adjust the acidity appropriately to improve the soil environment and promote the absorption of nutrients by the roots.
3. Timely Pruning
Prune once every autumn, removing the diseased, old, and weak branches of fruit trees to reduce nutrient consumption, prevent leaf yellowing, and reduce disease occurrence. This allows the nutrients in the soil to be concentrated and transported to the fruiting branches, increasing the yield for the following year.
4. Garden Management
Control water and fertilizer application to avoid keeping the soil in a dry state for too long. Supplement calcium, iron, zinc, magnesium, and boron elements appropriately. Do not use uncomposted farm manure to increase the overall growth of the plant. Perform thorough cleaning of the garden in winter, dealing with fallen leaves and diseased branches to prevent diseases and pests for the next year.
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