Some aspects of ecological behaviour of Helicotylenchus abunaamai Siddiqi, 1972

In 1 per cent water agar, Helicotylelichus abunaamai fed ectoparasitically on main roots, rootlets, rcot hairs and congregated around the meristematic zone of rice roots. The population development on pot-grown rice cultivar Jagannath, indicated progressive increase in nematode density upto the fourth month followed by a decline in the last two months. The nematode survived in moist sterilized fallow soil in decreasing frequencies upto 7 rronlhs, Soil tcxtu texture ifluenced the population build up on rice. Among the different types of soils, sandy loam favoured the maximum population build up.