Nematicidal efficacy of herbal powders on Meloidogyne incognita (Tylenchida: Meloidogynidae) on potted watermelon

다국어 초록 (Multilingual Abstract)

Nine herbal powders were tested against root-knot nematode, Meloidogyne incognita (Kofoid and White)Chitwood (Tylenchida: Meloidogynidae) under greenhouse conditions. The herbal powders were collectedfrom Gezira State, Sudan. Herbal powders were used without extraction to simplify the application byfarmers. Most of the herbal powders were effective in controlling M. incognita in the soil compared to thecontrol. Some treatments (e.g., Acacia nilotica (L.), Argemone mexicana L., and Azadirachta indica A. Juss) hadstatistically lower Root Knot Index (RNI) than the control. The number of juveniles per 100 g soil was lower insoil amended with Dinbera retroflexa (Vahl), Azadirachta indica, Salvadora persica (L.), and Acacia nilotica thanin unamended soil. The results of both RNI and number of juveniles were not significantly different from thesynthetic nematicide used. Herbal powders from A. indica and Acacia nilotica may be promising incontrolling of this pest because they are readily available to farmers in tropical regions.

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