Field experiments were conducted in 1975, 1977, 1978 and 1979 at Tallassee, Alabama to determine the degree of damage caused by Hoplolaimus galeatus (Cobb) Sher alone and in combination with Meloidogyne incognita (Kofoid and White) Chitwood, Paratrichodorus (N) christiei (Allen) Siddiqi, Pratylenchus brachyurus Steiner, and Tylenchorhynchus claytoni Steiner on selected soybean (Glycine max) cultivars. Control of H. galeatus with planting time applications of DBCP (14 l/ha) resulted in significant increments in yield of most soybean cultivars in an experiment where the nematode was the only parasite. In another experiment, the combination of H. galeatus with M. incognita resulted in the greatest yield loss recorded for all experiments as measured by response to DBCP treatment. Control of P. brachyurus and P. christiei in combination with low numbers of H. galeatus also resulted in significant yield responses. Results suggested that losses from T. claytoni were not important at the lev
