Interactions of Cucumis myriocarpus, Lippia javanica and Ricinus communis Organic Amendments on Suppression of Meloidogyne incognita

Interactions of wild cucumber (Cucumis myriocarpus) fruits, fever tea (Lippia javanica) leaves and castor bean (Ricinus communis) fruits on suppression of the root-knot nematode (Meloidogyne incognita) and improving tomato (Lycopersicon esculentum) productivity were tested using the ground leaching technology (GLT). The eight treatments of the three-factor factorial trial were arranged in a randomized complete block design with 10 replicates. Nematode numbers were inoculated at either 6500 or 6800 juveniles per plant and amendments were each applied to equally provide a total of 6 g per plant. Second-order interactions significantly decreased final nematode numbers, but increased tomato fruit yield, dry shoot weight and plant height. Results of the study demonstrated that combining the three plant materials served well as a bionematicide with fertilizer effect on tomato production using the GLT.