Division of Nematology, I.A.R.I., New Delhi-110 012.
Morphological and morphometric variations were recorded among the populations of Tylenchorhynchur mashhoodi. Intra-specific variations in the shape of spear knobs, position of excretory pore, shape of basal bulb and cardia number of tail annules, length and shape of spicule and gubernaculum were recorded, whereas number of lip annules (3–4), position of dorsal oesophageal glands opening (2–3 μm behind the spear base) and hemizonid (1–2 annules long) showed limited variability.
Intra-specific variation, Tylenchorhynchus mashhoodi
