Indian Institute of Horticultural Research, Hassaraghatta Lake P.O., Bangalore-560 089.
*Present Addresses: National Research Centre for Spices, Marikkannu, Calicut, Kerala, India.
Twenty-one extracts obtained from twelve plants were screened for nematicidal activity against the root-knot nematode, Meloidogyne incognita. The methanol extracts of Catharanthus roseus roots and defatted onion seeds and the essential oil of Pelargonium graveolens showed significantly high activity. The methanol extracts of Gloriosa superha seeds also showed moderate activity. The chemical nature of the active fractions and their possible use in agllculture are discussed.
Nematicidal activity, plant extracts, Meloidogyne incognita, Catharanthus roseus, Gloriosa superba, Pelargonium graveolens, onion seeds
