Control method for preventing leaf vegetables against root-knot nematode

Abstract

The invention discloses a control method for preventing leaf vegetables against root-knot nematode. The method comprises the following steps: dividing to-be-processed land into a land parcel without root-knot nematode, land parcels at moderately severe degree and incredibly serve degree of root-knot nematode and a land parcel with serious root-knot nematode according to damage degree of root-knot nematode; taking a preventative mode to the land parcel without root-knot nematode and controlling an infection source and cutting off a transmission mode to prevent occurrence of root-knot nematode; locally changing soil and simmering saw dust as for the land parcels at moderately severe degree and incredibly serve degree of root-knot nematode and preventing root-knot nematode in combination with small vegetable beds or ridging planting, drip irrigation, intercropping and interplanting techniques to reduce density of population; and closing a greenhouse as for the land parcel with serious root-knot nematode and preventing root-knot nematode in combination with biological bacterial fertilizers, small vegetable beds or ridging planting, drip irrigation, intercropping, different crop rotation techniques. The control method for preventing leaf vegetables against root-knot nematode is simple and practicable and low in cost so that non-pollution prevention and control over root-knot nematode for leaf vegetables is effectively achieved.

Description

technical field [0001] The invention relates to the technical field of disease and insect pest control, in particular to a method for preventing and treating root-knot nematode disease of protected leaf vegetables. Background technique [0002] Root-knot nematode disease is an important disease of crops in my country. There are more than 2,000 kinds of crops affected, especially harmful to various leafy vegetables. root-knot nematode, peanut root-knot nematode and other nematodes. The life cycle of root-knot nematodes goes through three stages: eggs, larvae, and adults. The second-instar larvae are the only effective age for root-knot nematodes to infect and harm plants. The second-instar larvae invade from the root tips of plants and develop into Adults, male adults return to the soil, female adults lay eggs and reproduce offspring, and most root-knot nematodes only carry out parthenogenesis. Root-knot nematodes survive harsh environments as eggs or 2nd instar larvae in oo...

AI Technical Summary

Problems solved by technology

[0005] At present, the control methods for root-knot nematode disease of leaf vegetables mainly include: (1) pesticide control, many of which are prohibited and highly toxic pesticides, generally can only kill the adults of root-knot nematodes, and the effect on the eggs of root-knot nematodes is not high. Not only the cost is high, but also the ecological environment is seriously damaged, causing serious safety hazards in the quality of agricultural products, and the control effect is poor; while low-toxic, pollution-free biological pesticides are expensive and slow in effect. Some farmers think that pesticides that cannot be effective immediately after use are not good. Good pesticides are a waste of manpower and material resources

(2) Soil replacement control is to remove the stubble plant residues and planting soil with insects. It can occur sporadically. If it occurs in a large area, it will require more labor and high cost for prevention and control.

(3) Soilless cultivation and control require large one-time investment, high operating costs, and high technical requirements. Professionals are required for the preparation and adjustment of nutrient solutions. There should be no obstacles in the supply of water and fertilizers, and high-quality management personnel are required.

(5) Crop rotation planting control is to plant root-knot nematode-resistant plants in rotation to limit the growth and reproduction of root-knot nematodes. This control method has a long cycle and seriously affects economic income.

(6) Microbial control, the effect is slow, and the problem of large insect population density cannot be solved

(7) Electric prevention and control, the operation is more troublesome, the cost is high and there are potential safety hazards, which is worse than other prevention methods

[0006] In summary, the prevention and control of root-knot nematodes is still a major problem in global agricultural planting, and there is a lack of systematic, comprehensive and efficient control measures

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