Evaluation of plant extracts on infestation of root-knot nematode on tomato ( Lycopersicon esculentum Mill ) (original) (raw)

Root-knot nematode, Meloidogyne incognita, is the major limiting factor in tomato production in many regions of the world including Ethiopia. For its management, different plant species (botanicals) are being tried in different forms as an alternative to nematicides. The nematicidal potential of baker tree (Milletia ferruginea), Bitter leaf (Vernonia amygodalina), parthenium (Parthenium hysterophorus), lantana (Lantana camara), Mexican marigold (Tagetes minuta), Mexican tea (Chenopodium ambrosioides), Neem (Azadirachta indica) and Pyrethrum (Chrysanthemum cinerariafolium) was assessed against M. incognita on tomato under field conditions. Aqueous extracts of the plants (20 g/100 ml w/v) were evaluated at 3 and 5% concentrations which was applied as soil drench one day after transplanting the seedling. Pronounced reduction in final nematode population density, root-knot index and a significant increase yield per plant and total yields of tomato were observed from plants treated with ...