A 2-year study was conducted on two different sites in each of two years to determine the effects of different row spacings and in-row seeding rates on nematode damage, incidence of Sclerotium rolfsii Sacc., and peanut vields, and to evaluate the management of nematodes. One site was infested with Meloidogyne arenaria (Neal) Chitwood, and the other with Pratylenchus brachyurus (Godfrey) Filipjev and Schuurmans Stekhoven and Criconemella ornata (Raski) Luc and Raski. 'Florunner' peanut (Arachis hypogaea L.) was planted in rows as follows: 1) two single rows spaced 91.4 cm apart on a 147-cm-wide bed seeded at 1.0X rate (seeds spaced approximately 7.6 cm apart in the row); 2) two pairs of twin rows (two rows spaced 20 cm apart) per bed seeded at 0.5X rate (seeds spaced 15.2 cm apart in the row); and 3) two twin rows per bed seeded at 1.0X rate. Nematicide treatments were: 1) no nematicide and 2) phenamiphos (2.8 kg ai/ha) in 1982 or ethylene dibromide (35.8 kg ai/ha) at planting plus al
