Seasonal variations of root-knot nematode population in a cardamom plantation

Population dynamics of root knot nematodes (Meloidogyne spp.) in a cardamom plantation was studied for three years. Number of second stage juveniles of root knot nematodes in soil was highest during March-April. Nematode population in roots increased rapidly during the post monsoon period, declined gradually during summer and was lowest in monsoon months. Crop phenology appears to be the major factor influencing the fluctuations in nematode populations than ecological factors like rainfall and soil temperature.