At present, the better ingredient in the market for the control of root-knot nematodes is thiazophos, which belongs to organophosphorus. Many vegetable farmers chose thiazophos to control root knot nematodes and they worked well. However, the use of pesticides containing this ingredient must be careful, otherwise it is prone to phytotoxicity, resulting in slow plant growth, poor root development, yellow leaves and so on. It is recommended that farmers use thiazophos correctly and correctly. First, thiazolone can not be directly contacted with the root system, and it can be mixed with soil. Secondly, do not use it excessively. The dosage of 10% thiazole phosphate granules is generally 2 to 3 pounds per mu, and the furrow is applied per acre. The dosage is 2-4 pounds. Can not be used excessively, otherwise it will cause phytotoxicity to vegetables. In addition, it is recommended that peasant households should use thiazol phosphate at the furrow or in the pit, and it is not recommended to use it because of the large amount of application and the lack of concentration of drugs and poor control efficiency. However, it is possible to spread 3 to 4 pounds and apply 1 pound to the hole. This works well, but the cost is high.

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