The latest prevention and control measures of grape gray mold

Grape gray mold, commonly known as rotten ear, is a relatively serious disease in the world at present, why all grape growth and storage period may occur. In grape disease, it caused the most serious damage, so grape gray mold symptoms are what kind of it? How to prevent it? Let's take a look.

1. Symptoms

Grape gray mold harm inflorescences and fruits, but also harm leaves and new shoots, inflorescences more cases, pre-flowering disease, inflorescences early disease like being scalded by boiling water, dark brown, soft rot of diseased tissue, gray mold layer densely on the surface, damaged inflorescences withered Yan, young fruit easily fall off. Black sclerotia will be produced on the infected fruit stalk; when the fruit is infected at maturity, it will first produce pale brown spots, which will soon spread to the whole fruit, causing the fruit to rot. When the disease is serious, the new shoot leaves will also be infected, resulting in irregular brown spots, and sometimes irregular round spots will appear. In the storage period, the fruits will be infected by germs, and the fruits will also change color and rot.

2. Rules of occurrence

The disease is generally divided into two times, one before and after flowering, the second time in the ripening period of fruit, in spring when the temperature is lower, the air humidity is higher, rain will cause the fruit pulp to crack, the bacteria will take advantage of it, leading to fruit rot. Gray mold onset temperature at 20 degrees Note that air humidity above 85%, if the air humidity of more than 90% is the incidence will be extremely serious. Therefore, the rainy season in spring is the onset period of gray mold. In addition, improper management of gray mold, such as poor ventilation, insufficient light, low-lying terrain, excessive application of trace elements, etc., will lead to gray mold of grapes.

3. Prevention and control measures

First of all, we should select varieties with strong disease resistance, control nitrogen fertilizer when excessive growth occurs, spray paclobutrazol to inhibit the growth of new shoots and enhance disease resistance. In the critical period of control when spraying chemicals before flowering, garlic oil 1000 times solution can be sprayed for prevention, fertilizer water should be added for prevention, and trace elements should be supplemented appropriately. Weeds in orchards should be removed regularly, ventilation and light transmission in orchards should be ensured, indoor temperature should be tested to ensure good disease control effect, soil quality and pest inspection and killing.

The above is the grape gray mold control measures introduced, I hope to help you, want to know more about the relevant knowledge, please pay attention to us.