芹菜根结线虫病的防治尉氏县农业发展中心戌惠民芹菜根结线虫病在各地发生较为普遍，尤以砂土、砂壤土上危害较重，并危害其它蔬菜作物。一、症状：芹菜根结线虫病菌主要危害根系，在根上形成许多大小不一的串珠状球形或近球形结，致使病株生长受阻，生长势衰弱，上部叶发... Celery root knot nematode disease prevention and treatment Weishi County Agricultural Development Center Hui Huimin Celery root knot nematode disease occurs more commonly in various places, especially in sandy soil, sandy loam more damaging and harmful to other vegetable crops. First, the symptoms: celery root-knot nematode bacteria harm the roots, forming many in the root of many different sizes of beads or nearly spherical knot, resulting in the growth of obstruction of the disease, the growth potential weakness, the upper leaf hair ...