Abstract

                                Morphometric variations in Heterodera cajani samples collected from different districts of Tamil Nadu showed variability in respect of cyst length and width, cone and neck length, fenestral width, L/W ratio; fenestral and vulval slit length. Biochemical analysis also revealed high proportion of protein (0.453-0.799 μg/g) and low proportion of carbohydrate (0.045-0.098 μg/g) and lipid (0.014-0.066 μg/g) at varying levels among different populations of Heterodera cajani and Globodera rostochiensis.

Key words : Biochemical and morphometric variations, cyst nematodes, Tamil Nadu.