[Objective] To study the control effect of three kinds of soil fumigants on root knot nematode disease of celery. [Method]The control effect of three kinds of soil fumigants( dazomet,metam-sodium and sulfuric oxyfluoride) on root knot nematode disease of celery was studied. [Result] Three kinds of soil fumigants( dazomet,metam sodium and sulfuric oxyfluoride) had good inhibitory effects on the 2 nd-instar larvae of root knot nematode and formation of root knot of celery,and also significantly increased the ...