Overwintering cultivation of "melon" must prevent the melon leaf "flower"

Over the winter cultivation of zucchini, watermelon and other melons, often due to high temperature and drought in the greenhouse, strong sunlight or lack of water, lack of fertilizer, extensive management and other reasons, causing a variety of virus infection to form mosaic disease. There were dark green spots on the leaves, and the upper leaves of severely diseased plants showed "chicken-claw-like" deformities, the plants were dwarfed, and later leaves were dry or dead. The surface of the diseased melons had knobs or deformities. Seriously affect the output and commodity. Therefore, regardless of the winter cultivation of zucchini, watermelon, melon, cucumber, etc., should prevent the occurrence of viral diseases.

First, clean the greenhouse, disinsect sterilization. Remove the remaining crops such as straw, deciduous, and weeds from the previous crop, and bury it deep outside the greenhouse to reduce the number of pests and worms in the shed. About half a month before colonization, insecticide and fungicides were used to treat the shed space and soil.

Second, the application of decomposed organic fertilizer or bio-organic fertilizer. Improve the physical and chemical properties of the soil, improve soil fertility, so that the melon plants such as summer squash are robust and improve the ability to resist mosaic virus.

Third, pharmacy soaking, reduce the seed poisoning virus transmission.

Fourth, timely sowing. Timely sowing can reduce the incidence of viral diseases. Because the incidence of zucchini virus disease is related to the sowing time. In the cultivation process, if there are no seedling coverage conditions such as shading nets, the incidence of mosaic virus will be heavy if the planting is too early, and the yield loss will be heavy; if the planting is too late, the fruiting period will be postponed, which will affect the cultivation efficiency. In addition, the method of using the live broadcast in the shed to plant seeds in a timely manner is lower than the rate of transplanting plants. The reason is: First, when the outside light is strong and the temperature is high, the air can be taken to open before and after the air outlet to make the shed interior cool. Cool and humid "microclimate"; Second, the live zucchini does not require transplanting, no slow seedling rooting period, growth is not affected, reducing the chance of transmission. However, the live melons are easy to grow into "high-legged seedlings," and attention should be paid to chemical control or strong seedlings.

Fifth, shading should be covered.

Zucchini and other melons are susceptible to mosaic virus disease when they are exposed to high temperatures above 25°C, and the longer the high temperature duration, the heavier the disease. After the seedlings become infected with virus disease, they generally show leaf shrinkage and short stature when they reach flowering results. Therefore, the anti-virus of the seedlings of Zucchini can not be neglected, and it is covered with shading so that the seedlings can grow under the environmental conditions of 22°C to 25°C.

Six, timely watering and spraying control.

In the seedling stage such as summer squash, it is necessary to prevent the drought and soil temperature of the seedbed from being too high. It is possible to take preventive measures that combine the use of small water and spraying agents. That is, in the seedling stage with 600 times strong seedling days up to 2116 plus 1500 times "Tianda Yufeng" liquid spray and irrigate, after sticking to 7 to 15 days spray wine once Guava fruit Tianda 2116 plus "Tianda Yufeng" , can promote plant robustness, improve disease resistance, purification inhibition and prevent the occurrence of melon mosaic virus disease.

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