1 Agricultural control
1.1 Rotate crops for serious nematode infections. Rotate high-sensitive vegetables such as celery, cucumber, and tomato with resistant vegetables such as green onions, garlic, leeks, and peppers. At present, one of the methods of preventing and controlling nematodes in Japan is to implement rotations in the field of disease and marigolds that are immune or highly resistant to nematodes, and have received good results. In addition, fast-growing leaf vegetables can also be used to trap nematodes, and nematodes in the roots are taken out of the soil when harvested, which can effectively reduce the harm to the crops. It is best to have a dry and dry rotation.
1.2 Cultivate disease-free strong seedlings Choose disease-free or disinfected soil to raise seedlings, cultivate disease-free seedlings, reduce the incidence of disease, and promote nutrition and seedlings.
1.3 In order to remove the diseased body in time, it is necessary to thoroughly clean the pastoral area after harvesting, to focus on burning or burying the diseased body. Do not use the soil with fertilizer or use a soil washer.
1.4 Soil protection for soil nematodes focuses on the characteristics of 0 to 35 centimeters below the soil surface. The 0 to 35 centimeters of soil in the protected area is replaced with a soil layer without root knot nematodes, which has a good effect.
2 Physical control
2.1 Flooded insecticides Irrigate 10 to 15 centimeters deep in severe disease fields and maintain them for 1 to 3 months. The nematode suffocates and suffocates. It can effectively inhibit nematode infestation and reproduction.
2.2 High-temperature pest killing Before harvesting, dip deep into the vegetable field, use the high temperature in July and August, and use plastic film to flatten the ground for 10 to 15 days so that the soil can reach a depth of 30 to 40°C at a depth of 10 cm. Effectively kill a variety of insect nematodes.
3 Chemical control
3.1 Irrigation method If nematodes are found after planting, 50% phoxim EC may be used as a 1000-fold solution, or 2.5% avermectin may be used as a 2000-times solution to irrigate the roots. Each agent is used for 300-500 ml.
3.2 The application of herbicide soil in previous years with severe disease, the seedlings before the colonization with 10% Yishubao granules 5 kg/mu mixed fine soil 50 kg evenly spread, squat 25 cm
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