How to control the zucchini virus disease
Zucchini served with tender fruit, nutritious, early market, high yield, deeply loved by consumers, but the zucchini is most susceptible to viral disease in the cucurbitaceae vegetables, the incidence rate is high, the loss is large, and the production can be reduced by more than half when severe, so Cultivation of zucchini should strengthen the prevention and treatment of viral diseases, in production should pay attention to the following points.
How to control the zucchini virus disease
I. Variety selection The tolerance to virus diseases varies among different varieties of squash, and the varieties such as mosaic zucchini, silver green zucchini, early green generation, and Atai generation are more resistant to virus diseases.
Second, the seed disinfection to destroy the seeds carrying the virus, can be soaked in 10% sodium phosphate solution 20-30 minutes, or soaked with 1% potassium permanganate solution for 30 minutes, rinse with water and then germination.
Third, the implementation of rotation of zucchini should be carried out for 3-5 years of rotation to reduce the accumulation of viruses in the soil.
Fourth, nurture strong seedlings, strict control of seedlings and nursery should be strengthened temperature, temperature management, prevent seedlings grow mad, nurturing strong seedlings, improve the resistance of seedlings, when transplanting, all infected seedlings will be eliminated in order to avoid colonization into a virus disease The source of infection, in order to avoid root infection virus disease during planting in autumn, can be broadcast live.
5. The eradication of roundworms is an important vector for the transmission of viral diseases. The occurrence and severity of viral diseases are closely related to the occurrence of roundworms and one of the key measures for early control of tick viruses. Can hang silver gray film to repel aphids, but also can use 2.5% of deltamethrin or even eliminate killing chlorinated oil 2000-3000 times, 50% anti-inferiority WP 800-1000 times, 10% cypermethrin EC 2500 times Alternating spray control, even spray 3-4 times, interval 7-10 days, where conditions can also be used insect net cultivation.
VI. Reducing contact with virus-borne diseases Viruses can be transmitted through plant wounds. Therefore, the row spacing should be increased in the cultivation and condylation should be carried out to minimize the wounds caused by agricultural operations. Farming operations should follow the principle of the first strain after the strain. For early maturation of zucchini, it is not necessary to burp and avoid causing wound transmission.
Seven, to strengthen the management of fertilizer and water, to prevent premature aging Zuigua seedlings are susceptible to premature aging virus disease, in the cultivation of fertilizer and water management must be strengthened to avoid dehydration from lack of water. In the hot season, watering may be appropriate and the ground temperature may be lowered. In places where conditions are available, shading and cooling may be adopted to prevent premature aging of the seedlings and reduce the disease resistance.
VIII. Chemical Control Seedlings Spraying 83-fold increasing agent 100 times, improve disease resistance of seedlings. In the early stage of disease, 20% virus A wettable powder 500 times solution, or antitoxic agent No. 1 300 times solution, or 1000 times potassium permanganate solution, or 20X10-6 naphthaleneacetic acid can be sprayed every 7-10 days. Spray 3-4 times, the above liquid can be used interchangeably. Http://
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