Results from a four -year crop rotation and nematicide study indicate that both rotation with non-host crops and Temik^® 15G (aldicarb) can significantly increase cotton yields in fields infested with high populations of reniform nematodes. According to the 1997 test results, three successive years of corn followed by cotton produced the highest cotton yields. Moreover, other crop rotation systems as well as nematicide produced significantly higher yields than continuous cotton with no nematicide.