In the early stage of radish root knot nematode disease, no abnormalities were observed from the upper part of the ground, and the affected plants grew weak, the leaves did not stretch, the leaves were small and yellow, the roots were deformed, and the roots were few.
Control measures
1. Carry out rotation and drying soil: Water and drought rotation with rice can effectively reduce the number of nematode bases in the soil. When planting radish, plow the soil in half a month in advance, turn the soil containing the nematode to the surface, dry it in the sun, and kill the nematode in large quantities to alleviate the disease.
2. Strengthen field management: timely remove the diseased roots and reduce the source of insects; increase the application of organic fertilizers and rational irrigation, promote the growth of new roots, and enhance the disease resistance and disease resistance of plants.
3. The timely application of nematicides is an effective method to control radish root knot nematodes. 3% Miller granules can be used in 1.5~2kg per acre or 40kg per acre. In the 15 days before planting, it is applied in the open ditch, the soil is compacted, and the ditch is deflated before planting to prevent the production of medicine. harm.
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