[Aims]This study aims to clarify the control effect and safety of the nematicides Macleaya cordata extract 0.3％ SL and 0.1％ GR against tomato root-knot nematode,and to provide scientific basis for the promotion and application in production.[Methods]Field efficacy trials were conducted according to the Guidelines for Field Efficacy Testing of Pesticides(Ⅰ),Nematicides for Control of Root Nematodes,and carried out in Taigu District,Jinzhong City,Shanxi Province,China,from 2022 to 2023,by using the hole-application and root-irrigation methods.[Results]The control effect of M.cordata extract 0.3％ SL at 3 tested concentrations was more than 68％ ,while that of M.cordata extract 0.1％ GR at 3 tested concentrations was more than 70％ ,which has no significant difference with that of matrine 0.3％ AS,but was significantly higher than that of abamectin 0.5％ GR.[Conclusions]The M.cordata extract 0.1％ .GR and 0.3％ SL can effectively prevent and control tomato root-knot nematode,and has good safety for tomato plants.
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