How to prevent and cure melon virus disease
Melon is a common fruit in life, with a crisp taste and a sweet taste. However, in the process of melon planting, the occurrence of viral diseases is a headache for melon farmers. The following is a small series for everyone to introduce the prevention and treatment of melon virus disease.
Melon virus disease symptoms
There are three main types of symptoms of melon virus disease. One is the presence of a vein in the heart leaf, and then it develops into a mosaic or dark green lesion, a deformity. When the drought is broken, the diseased leaves shrink, and the melon vine loses the ability to produce results. The second type is yellowing type, which is initially chlorotic yellow spot on the leaf, and then turns into mottled flower leaf. The leaf turns yellow, thickens, the veins are prominent, the leaf edge is zigzag, the plant shape is dwarf, and the internode is short. The third type is necrotic, with irregular necrotic spots and streaks on the leaves, and dwarf plants in severe cases.
The incidence of melon virus disease
Melon seeds can be toxic, but can also be transmitted through cotton aphid, peach aphid and mechanical friction. High temperature and drought or strong light is conducive to the onset. The onset of disease, the severity of the disease is related to the rate of seed poisoning and the climate of melon growth, the rate of seed poisoning is high, and the disease occurs early; the weather is dry and hot in the growing season, the number of aphids is large, and the incidence is heavier.
Melon virus disease prevention and treatment method
1. Choose disease-resistant and disease-resistant varieties.
2. Avoid heavy mistakes. Keep away from vegetable fields, avoid mixing melons and pumpkins to prevent mites from transmitting to each other.
3, timely broadcast and cover with plastic film, plastic film, early cultivation.
4. Strengthen field management. To apply the base fertilizer, increase the application of phosphorus and potassium fertilizer. In the result period, foliar topdressing with 0.2%-0.3% potassium dihydrogenate can be used as a passivation effect on viral diseases to achieve disease prevention.
5. Seed treatment. Soak seeds in warm water at 60-62 °C for 10 minutes before sowing. Stir in the soaking seeds. After the water is cool, immerse for 18 hours, then germination and sowing. Soak seeds with 10% trisodium phosphate solution for 20 minutes, rinse off, and rinse with water. 18 hours, then germination, sowing.
6. Eliminate mites. It can be controlled by using 2.5% of the net emulsifiable concentrate 500-800 times solution or 40% of the dimethoate emulsifiable concentrate 800-1000 times.
7. In the early stage of the disease, 20% virus A wettable powder 500 times liquid or 1.5% phytopathogenic emulsion 1000 times liquid, or 25% virus K1000 times liquid is used for prevention and treatment of spray.
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