Toxicity of Different Plant Parts of Tagetes Lucida to Plant Parasitic Nematodes

Water extracts of different parts of marigold (Tagetes lucida) were highly deleterious to Meloidogyne incognita, Rotylenchulus reniformis, Tylenchorhynchus brassicae, Hoplolaimus indicus, Helicotylenchus indicus and Tylenchus filiformis, however, to varying extent. The nematode mortality increased with increase in the concentration of the extracts and the exposure period. Juvenile hatching of M. incognita was also greatly inhibited by the extracts. Inhibition in the hatching increased with increase in the concentration of the extracts. Flower extracts caused greatest nematode mortality and inhibition in juvenile-hatching followed by seed, leaf and root extracts.