Spring rape sclerotinia prevention method
First, the Qing ditch pitted spring rain increased, rape fields vulnerable to waterlogging, from time to time affect the respiration and absorption ability of rapeseed root, weight is responsible for rotten rot of rape, affecting yield, and due to high humidity in the field, easy to disease epidemic , To clear the gutters early.
Second, the cultivator loose soil in rape flowering till the flowering period of cultivation can cut off the sclerotinia produced by the ascidian fruit, has a significant effect on the reduction of disease, but also control the weeds of the people, improve the permeability of the soil.
Third, timely playing old leaves in the flowering period to the final flowering period of rapeseed, timely removal of yellow, old, diseased leaves, in order to reduce the source of the disease, to improve ventilation and light conditions in the field. The old leaves should be dried after dew on sunny days, and the old leaves laid should be taken out of the field for destruction.
4. Potassium Fertilizer Potassium Fertilizer Increased Potassium Fertilizer in Spring can increase the disease resistance of the plants from late February to early March of the following year. The use of potassium chloride for 5-6 kilograms of mu should be used to pour the canola root on sunny afternoons. It is also possible to spray potassium dihydrogen phosphate solution from the bud to the flowering stage.
Fifth, the focus of chemical and pharmaceutical control is on rapeseed fields with susceptible varieties, fields of continuous cropping, low-level paddy fields, and partial application of nitrogen fertilizer. In the early flowering period to full flowering period, the diseased leaf rate is 8% to 10%, the diseased stem rate is 1%, the application rate is 40%, mu 40% carbendazim suspension is 150g, and the water is sprayed 50-75kg. - Spray 10 times a day. Spraying should be sprayed on the lower stems and leaves of rape in order to improve the control effect.
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