A study on the dynamics of phytoparasitic nematodes as a function of treatments aqueous extracts- based of Allium sativum and/or Azadirachta indica but also of the host plant, okra (Abelmoschus esculentus), was carried out at the “Institut Supérieur d’Agriculture et Entrepreunariat” (ISAE) test station, from June to September 2020. This study was undertaken as part of the sustainable management of bio-aggressors. We were able to develop two biocides, one based on Alluim sativum and the other on Azadirachta indica. From 68 soil samples we extracted 1958 specimens among which 904 are identified as free nematodes and 1054 as parasitic plant nematodes; phytonematodes of the Order of Rhabditida are more numerous with a prevalence of 53.6%. Our study pointed out that the biocides used have no effect on the phytonematodes encountered or on gumbo, but also that gumbo has no effect on these phytonematodes. However, our results show that okra is resistant to rhabditic phytoparasites found in the plot. This type of study is being conducted for the first time on phytonematodes in Senegal.