Symptoms and prevention methods of gourd virus disease, what specific medicine is good?

When cucurbit virus disease occurs, some uneven mosaic spots appear between leaves and veins, the top Ye Er stops growing, and the whole pumpkin plant wilts. Under the conditions of drought, high temperature and strong light, aphids are common in zucchini in greenhouse, and it is difficult to treat cucurbit virus diseases, so prevention should be given priority, and amino oligosaccharide+zinc fertilizer can be sprayed for passivation.

Symptoms of gourd virus disease

When the virus disease of cucurbits occurred, some uneven mosaic spots appeared between the leaves and veins of cucurbits, which were more serious. The top Ye Er stopped growing and the whole cucurbits wilted.

Of course, there is also a yellowing and shrinking type, that is, thick green and raised wrinkles appear on the surface of the leaves between the veins of the upper leaves of zucchini, and at the same time, the leaves turn yellow, shrink and roll down, resulting in uneven liquid, which will cause serious symptoms of the whole zucchini.

Harm of gourd virus disease

Cucurbita pepo virus disease is a common disease in the process of pumpkin planting, with a general incidence of about 15%, and sometimes it can reach more than 70% in serious planting greenhouses. Once you get this disease, the yield can often reach 40-50%, and the injured zucchini looks ugly and is not easy to sell, which leads to the early emergence of zucchini seedlings or even no yield.

Etiology of gourd virus disease

The optimum temperature of gourd virus disease is above 20 degrees, which is particularly easy to break out, especially under the conditions of drought, high temperature and strong light. At the same time, in greenhouse cultivation, the disease spreads quickly, which reduces the disease resistance of zucchini and leads to more serious diseases.

What medicine is effective for gourd virus disease?

It is difficult to treat cucurbit virus diseases, so prevention should be the main method, such as spraying amino oligosaccharide+zinc fertilizer, and using ningnanmycin or moline guanidine+zinc fertilizer+thiamethoxam and other piercing-sucking mouthparts insecticides to relieve them. Zinc fertilizer has the function of inactivating virus. By enhancing the resistance, such as increasing the application of organic fertilizer and Bacillus amyloliquefaciens. Control output and promote growth.

Specific medicine for treat gourd virus disease

Cucurbit virus disease should be prevented and treated with pesticides such as lentinan and amino oligosaccharide in advance, and it is best to spray zinc fertilizer and regulator. It is best to prevent viral diseases in advance, and there is no therapeutic product after illness, which can only be passivated.

Prevention and control methods of gourd virus disease

1. Seedling management: From the seedling stage, it is necessary to strengthen the means of prevention and control of melon virus diseases. Before planting, we must add some weak and diseased seedlings and select them in time, apply foot fertilizer and base fertilizer, and pay attention to the application of phosphorus and potassium fertilizer to promote the normal development and growth of melon roots and enhance the disease resistance of melon plants.

2. Watering and ventilation: Pay attention to watering in the usual management process to prevent the shed from being too dry. Pay attention to the prevention and control of aphids in the shed, use insect-proof nets in the vents, and use more sticky insects in the shed to reduce the harm of aphids and prevent aphids from spreading in the shed.

3. Chemical control: The main vectors of viral diseases are aphids and whiteflies, so it is necessary to strengthen the chemical control of these two pests, focusing on prevention at the initial stage of the disease.

4. Prevention and control drugs: ningnanmycin aqua can be selected for spraying, and water can be sprayed every 5-7 days or even 65,438+00 days according to the incidence of virus diseases in the shed.