The reniform nematode, Rotylenchulus reniformis, has been identified from several cotton and soybean fields in four counties in Arkansas. Field surveys have indicated that population densities within many of these fields are high. However, there is no information concerning the significance of this nematode in Arkansas in terms of effects on cotton yield. Field nematicide trials were established in 1992 in Monroe, Lonoke, and Jefferson Counties in fields with high reniform nematode population densities. The objectives of these tests were to evaluate the efficacy of non-fumigant nematicides for control of reniform nematodes in cotton and to evaluate the effects of reniform nematodes on cotton performance in these fields. Treatments common to all three locations included application of Temik 15G applied at either 7.0 lb/acre in the planting furrow or 10.0 lb/acre on a 7-inch bank over the row at planting and Nemacur 15G applied at the same rates and in the same manner. Nematicide application did not affect fall reniform population densities in comparision to untreated densities at harvest ranged from approximately 1.2 x 10⁴ in Jefferson County to 4.7 x 10⁴ in Monroe county. A trend toward slightly higher seedcotton yields where nematicides were used was apparent at all three locations; however, these differences were not statistically significant.