Suppressive effect of seed powders of some Brassicaceae plants on Meloidogyne incognita (Kofoid & White, 1919) Chitwood, 1949 (Tylenchida: Meloidogynidae) in tomato and cucumber

The aim of the study was to investigate suppressive effect of powdered seeds of Raphanus sativus L. (red radish), Lepidium sativum L. (cress) and Eruca vesicaria (L.) Cav. (arugula) (Brassicales: Brassicaceae) on Meloidogyne incognita (Kofoid & White, 1919) Chitwood, 1949 (Tylenchida: Meloidogynidae) in tomato and cucumber. This study was conducted under controlled conditions between January and April in 2022. The experiment consisted of 14 treatments of seed powders singly, or in double or triple combinations. Nematode inoculation was made with 1 000 J2 one week following the transplanting of tomatoes and cucumbers into pots. The seed powders were mixed with the soil three days after the nematode inoculation. The root gall and egg mass were evaluated on a scale of 1-9 and the percent control effect was calculated 60 days after treatment. The highest control effect on gall and egg mass (70%) was with a triple powder treatment which consisting of radish (2 g/plant) + cress (2 g/plant) + arugula (2 g/plant) on tomato and cucumber. The control effect of double powder treatments on gall and egg masses were above 55% in tomato and cucumber. The control effect of radish (6 g/plant) in both host plants was found to be similar to double powder treatments which arugula (2 g/plant) + radish (2 g/plant), and cress (2 g/plant) + radish (2 g/plant). In single treatments, the highest control effect was obtained with radish (6 g/plant). In double powder treatments, those containing radish were found to be more effective against M. incognita. It was concluded that treatment with radish seed powder against M. incognita was more successful than with cress and arugula powders.

Automated summary

The study investigated the suppressive effect of powdered seeds of red radish, cress, and arugula on Meloidogyne incognita in tomato and cucumber. The results showed that the treatment with radish seed powder was more successful in controlling the nematode compared to cress and arugula seed powders.