Management of phytonematodes infecting tomato and eggplant with methanol extracts of two plant species

Abstract

Leaf extracts of the plants Jatropha curcas and Brassica nigra were used as bare-root dip treatments for the management of the phytonematodes Meloidogyne incognita and Rotylenchulus reniformis infecting tomato (Solanum lycopersicum) and eggplant (Solanum melongena). The extracts of both plants significantly reduced the root-knot development caused by M. incognita and the multiplication of R. reniformis. Leaf extracts of J. curcas inhibited the multiplication of the nematode more than those of B. nigra. Plant growth was also improved. Higher concentrations of leaf extracts or longer duration of root dip treatment increased plant weight and reduced disease incidence.