Abamectin is an agricultural and veterinary insecticide and acaricide, a macrolide disaccharide compound. Abamectin has contact and stomach poisoning effects on insects and mites and has a weak fumigation effect, but its lethal effect is slow. But there is less residue on the plant surface. Recently, many farmers have reported that avermectin is not effective in controlling root-knot nematodes, and some farmers even say it has no effect at all. Abamectin has a strong repellent effect on root-knot nematodes, ectoparasites and other arthropods. Why don't they reflect the effect? By communicating with them, we learned that the poor results were related to their improper use. Many farmers find it very troublesome to use avermectin for root irrigation, so they wash the avermectin into the ground with water and use it to control root-knot nematodes, but the effect will definitely be greatly reduced. Because the effectiveness of abamectin can only be guaranteed when it is used at a multiple of 1,500 to 2,500 times. In other words, when applying with water, it should be ensured that about one pound of avermectin is added to each cubic meter of water. How many farmers can do such a large amount? But if this concentration cannot be reached, it will be difficult for abamectin to fully exert its effect. This is why farmers report that abamectin has poor effectiveness in controlling root-knot nematodes. Vegetable production in the north and south of my country can suffer varying degrees of damage from root-knot nematodes. Especially in greenhouse vegetable production areas, due to the prominent phenomenon of repeated cropping, it is easy to cause root-knot nematode disease. The yield loss is generally 10-30%, and in severe cases, it can be as high as more than 50%. At present, there are many comprehensive measures to prevent and control root-knot nematode disease, but the use of highly effective pesticides is the first choice to prevent and control the disease. It has unique advantages in rapidly reducing nematode density and emergency control. However, as a nematicidal pesticide, it will inevitably have negative effects. . In order to pursue its benefits and avoid its harm, we have summarized the relevant research progress and practical experience in recent years, and initially introduced pollution-free vegetable nematicides and their rational use technology. In order to help vegetable producers prevent and control root-knot nematodes in a safe, environmentally friendly, cost-effective way. Abamectin has a good inhibitory and preventive effect on the occurrence of soil-borne diseases of crops, and is especially effective against soil-borne parasites such as root-knot nematodes, cyst nematodes, and stem nematodes.