Department of Plant Pathology, University of Agricultural Sciences, Hebbal, Bangalore-560024, India.
1 Adapt from M.Sc. (Ag) thesis submitted to the University of Agricultural Sciences, Bangalore by the senior author.
The pathogenic effects of root-knot nematode, Meloidogyne incognita to patchouli, Pogostemon cablin were investigated at inoculum levels of 100, 1000 and 10,000 nematodes per plant under pot culture conditions. Significant reduction in root and top weights was recorded. As high as 15.9 and 27.9 per cent reduction in top and root weights respectively was recorded with an initial inoculum level of 10,000 nematodes per plant over a period of six months. Loss in top weight and shade dried leaf yield due to M. incognita was found to be 47 and 86.7 per cent respectively under field conditions when tl!e root-knot index was 2.75 in 1.4 scale.
Pathogenicity, Pogostemon cablin, Crop loss, Meloidogyne incognita
