Root knot nematode disease, as a devastating pest and disease that often occurs in the process of vegetable planting, has continued to expand in recent years, and the degree of damage has increased year by year.
Root-knot nematode is a kind of nematode that damages the roots of vegetables. Because the vegetables form different types of tumors on the lateral roots and fibrous roots, the disease resembles a similar disease, so it is called root-knot nematode disease. Root-knot nematodes mainly cause damage to cucumbers, tomatoes, eggplants, summer squash, celery, and oiled wheat, which generally cause a 20% to 30% reduction in yield, a 60% reduction in yield when serious, and even an unacceptable harvest, causing great economic losses to vegetable growers.
Recently, Yongnian County Agricultural and Animal Husbandry Plant Protection Station and the South Davao and Zhangxibao Districts are standing in greenhouse vegetable surveys. Root-knot nematode disease mainly occurs on celery and oiled wheat dishes, and the diseased shed rate is 5%-8%. The rate was 10.5%-13.2%, and the oil and wheat dish was 21.8%. In the prevention and control of vegetable root-knot nematodes, we must adopt comprehensive prevention and control measures that combine anti-nematode species, ecological control, biological control, and chemical control.
I. Agricultural measures
After the harvest of the vegetables, the diseased roots were removed (excavated) and taken deep outside the shed. Choose disease-free soil for seeding or use substrate for soilless seedlings.
Second, chemical prevention
Before planting, 10% Shiliqing (thiazol phosphine) 2 kg/mu can be used to uniformly spread the pesticide on the surface of the soil. Then use a rotary tiller or hand tools to fully mix the pesticide and the soil. The depth of mixing of the chemical and soil is 15-20 cm. .
Third, biological control
In lightly affected areas, before the colonization, 50 times liquid scorpion (Bacillus cereus) was used to root or spray, and 6-9 liters of liquid was used.
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