Root-knot nematode disease is the main disease of celery and occurs only in local areas. Once it occurs, the infection rate is extremely high. Symptom recognition Root knot nematode disease only occurs in the roots. The seedlings mainly invade the main roots, and the adult and young lateral roots and fine heels are frequently invaded in the adult and semi-plant stages. When the roots are victimized, many nodules with different sizes and shapes are formed, and the surface is rough, with milky white to milky yellow. The symptoms of the aerial parts were not obvious, mainly manifested as poor growth, short stature, and wilting of plants when the air was dry. Control methods 1. Thoroughly clean the pastoral area. Carefully remove the roots of the plant after the front rake and pull it out to bring it out of the garden and destroy it. 2. Rotate crops and implement crop rotations with onions, garlic, leeks, peppers, etc., to reduce losses and reduce the number of nematodes in the soil. 3. Soil and earth seedlings, selecting land plots that have not experienced root-knot nematodes, and preventing root-knot nematodes from spreading through the soil, can adopt seedlings for seedlings and shorten the seedling-reducing period. 4. The soil in the greenhouse is sterilized at high temperature. The root-knot nematode prefers a warm and dry environment. The optimum soil temperature for growth and development is 25°C-30°C, and the soil moisture content is about 40%. When the root-knot nematode is below 10°C, the larvae stop moving. At 55°C, the larvae can die within 10 minutes. In midsummer, the soil is deeply turned and ditched and ridged. Under conditions, quicklime can be applied to the soil, and the water canopy can be covered with plastic film to seal the shed for 10-15 days. The use of summer light can effectively kill root-knot nematodes. In the northern winter, surface soils can be replaced by soil, and a large number of eggs can be frozen and killed in the winter. 5. For pharmaceutical treatment, use 15% avivectin microcapsule suspension agent or spread with 10% thiazole phosphine granules. Diapers, Napkins, Bed pad, Under Pad, Adult Diaper,Bed sheet Hygienic Products,Diapers, Napkins,Bed pad,Under Pad,Adult Diaper Luck Medical Consumables Co.,LIMITED , https://www.luckmedical.com