Department of Nematology, Haryana Agricultural University, Hissar.
Total nematode populations (recorded during 1978–80) reached peaks during October and April. Comparatively, higher population was recorded at 30 cm distance from tree base than 90 cm. Vertically, nematodes were more at 0–15 cm than 15–30 cm at both the distances from the tree base. Citrus nematode population in roots/soil showed similar trend. High populations of Xiphinema index, Helicotylenchus dihystera and pratylenchus pratensis were recorded in October, while Hoplolaimus indicus population increased from April to May.
