Effect of different initial population densities of Meloidogyne incognita on the root-knot development, nematode multiplication, plant growth and seed yield of Plantago ovata

摘要

The effect of initial population densities of Meloidogyne incognita on the root-knot development, nematode multiplication, plant growth and seed yield of Plantago ovata was determined under pot conditions. M. incognita significantly reduced all growthparameters viz., root-shoot length, fresh and dry root-shoot weights, number of spikes/plant and seed weight/plant at all initial population densities as compared to uninoculated control. The highest reduction in shoot-root height, shoot-root fresh anddry weights, number of spikes/plant and seed weight/plant was 67.8, 72.0, 83.9, 85.9, 86.0, 88.2, 88.2 and 88.7%, respectively at the highest population density (12,500 J_2/kg soil) as compared to uninoculated control.