(1) Hazards and Diagnosis: The disease is caused by pests. At the time of onset, it mainly harms the lateral roots or fibrous roots of the zucchini. After the onset of disease, it produces necrotic root nodules of different sizes and dissects the root knots. It can be found that there are many tiny milky nematodes in the diseased tissue. Severely ill plants have poor growth, wilting or yellowing of the leaves at noon, and short plant type, sometimes leading to plant deaths.

(2) Control methods: 1 water flooding method, conditional irrigation of the surface of 10 cm, even for several months, can prevent root knot nematodes in a variety of vegetables. 2 Pharmacy control, application of pesticides per acre before planting, and the use of root application of root irrigation, can promote the effective removal of pesticide active ingredients against fruit tree root pests. Long-term irrigating roots can produce strong immunohistochemical antibodies, can promote the infinite development of plant roots, and can facilitate the navigation of plant nutrient elements to promote matching and transportation.

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