Indian Journal of Nematology

Population density, vertical distribution and seasonal fluctuations of Tylenchorhynchus zeae were studied in the rotations and monoculture of crops from cultivated fields around Burdwan and Bankura (West Bengal). T. zeae was abundant in all cropping sequences; monoculture supporting more than rotations. Numbers increased as crops grew and the rate of increase was greater in earlier than in later stages of plant growth. Number of T. zeae decreased in soils containing linseed and under an excess of soil moisture. There were more larvae than either females or males, especially 0–5 cm deep. Most adults were found in the 5–10 cm layer. Numbers showed two seasonal peaks, one during February–March and the other in October.