Cucumber root knot nematode prevention and treatment method

Cucumber root knot nematode disease mainly affects the roots of cucumber, which is characterized by increased lateral roots and fibrous roots. The damage and pathogenesis of root-knot nematodes on plants is different from the mechanical damage caused by insect chewing plants. Root-knot nematodes secrete saliva containing a variety of enzyme-containing systems before ingesting the nutrients in the main plant. Due to the toxic effects of saliva, a series of physiological lesions and tissue lesions occur inside the host. For example, a spherical or conical tumor or the like is formed on the young fibrous root. The tumor is initially white, soft in texture, then turned brown or dark brown, and the surface is cracked. The aerial part of the victim plant grew weak, the leaves were yellow, and finally died.
(1) In the onset period, if the local damage in the greenhouse is selected, 50% phoxim emulsifiable concentrate 1500 times solution, or 80% dichlorvos emulsifiable concentrate 1000 times solution, or 90% trichlorfon crystal 800 times solution can be used for root irrigation. 250 to 500 ml per plant. (2) Nematode is a pure biological preparation with no residue after application, especially suitable for the production of pollution-free vegetables. Each acre can be applied after mixing 0.5 kg of nematode with nutrient soil at the seedling stage. In the adult stage, use 1 to 1.5 kg of nematode per acre and mix it with appropriate manure or fine dry soil and apply it to the soil.

Huaxian Agricultural University Liu Huimin

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