Evaluation of Commercial Upland Cotton Varieties for Reaction to Fusarium Oxysporum f. Sp. Vasinfectum Race 4 in Texas.

We are reporting on the reaction of 27 commercial Upland cotton varieties planted in a field in El Paso county infested with Fusarium oxysporum f.sp.vasinfectum race 4.  This was a replicated, randomized trial and plants were evaluated several times during the growing season for symptoms.  The pathogen was confirmed by isolations from symptomatic plant tissue.