Annals of Plant Protection Sciences

Perusal of data indicated decrease in plant growth parameters with increase in the initial inoculum density of Meloidogyne incognita under both ambient and enriched CO₂ concentration accompanied by increased soil and root population including root-knot index. Plant growth parameters irrespective of inoculum levels of nematode were higher under enriched CO₂ concentration. The combined analysis of data indicated significant increase in plant growth and decrease in nematode parameters with progressive increase in the initial inoculum density. Thus, 100 J₂/kg soil was estimated as the damaging threshold level of M. incognita.