Trends in Biosciences

A field trial on seasonal fluctuation of Hoplolaimus indicus on three genotypes on pigeonpea representing three maturity groups i.e. early maturing (EM), UPAS 120, medium maturing (MM), PDA 86-1 and late maturing (LM), T-7 was carried out at Indian Institute of Pulses Research. At monthly intervals, soil samples were drawn from each treatment for a period of one cropping season. Nematode population growth over a growing season of three genotypes was not found identical but it varies with maturity groups. The maximum population was encountered at the flowering stage at the respective maturity group genotypes which suggested that H. indicus was specific to pigeon pea crop. This study indicated that management of nematodes can be under taken by checking high build up of population prior to flowering stage of pigeon pea crop.