ABSTRACT

The cotton variety Stoneville 5599BR was tested in a highly infested root-knot nematode (Meloidogyne incognita) field to determine the performance of the variety. The treatments were Stoneville 5599BR planted with and without the soil fumigant Telone II (1,3-dichloropropene) to see how the variety would perform in a greatly reduced nematode population area as well as in the highly populated area. Nematode samples taken at cotton emergence, first square, bloom, and first harvest showed that the nematode population increased significantly at the post harvest sampling period. Yields in the Telone II treated plots were significantly higher than the non-treated areas. These two results lead to the conclusion that Stoneville 5599BR is not totally resistant to root-knot nematodes. However, the non-Telone II treated plots yielded well in the 31 variety test in which the plots were embedded, indicating that at least a fair degree of tolerance is present in Stoneville 5599BR to root-knot nematodes.