It should be root-knot nematodes, which should be prevented before colonization. Abamectin or thiamethoxam granules should be used in ditches or holes, and melons and leafy vegetables should be careful that thiamethoxam should not directly contact the roots. The fumigation effect of Weibaimu is also good, which can control soil-borne diseases and root-knot nematodes at the same time.

If abamectin or thiamethoxam water solution is used to irrigate roots during the growth period, melons and leafy vegetables should pay attention to the dosage of thiamethoxam. The general curative effect should be paid attention to for more than two months, and serious areas should be treated according to the situation. Thiamethoxam has a high cost.

Rhizobia only exist in beans.