Investigating the Interaction of Breeding Lines and the Nematicide, Velum Total, to Reniform Nematode (Rotylenchulus reniformis)

Reniform nematode (Rotylenchulus reniformis) (RN) is a factor limiting cotton yields. At present, nematicides are an effective management tool for producers with only marginal resistance/tolerance being observed in commercial cultivars. The objective of our study is to investigate the use of moderately resistant breeding lines and the interaction effect of nematicide x breeding line under high RN pressure. A population has been developed from a cross with a RN resistant line and a conventional cultivar. Select breeding lines from the F₄ generation were planted in a split plot design with genotype being the main treatment and the nematicide, Velum, as the sub treatment. This design was replicated four times in field trials of both a RN infested and non-infested field in Belle Mina, AL, as well as in microplots at Auburn University. These results will be presented.