Cotton (Gossypium hirsutum L.) is very sensitive to the phenoxy herbicides, in particular, 2,4‐dichlorophenoxy acetic acid (2,4‐D). This sensitivity results in damage causing significant economic loss each year. A study was conducted at the Texas Agricultural Experiment Station, Etter, TX, on a sherm silty clay loam soil (fine, mixed, mesic, Torrertic Paleustoll) in 1981 and 1982 to determine if there were genetic variability for resistance to 2,4,‐D damage. Twelve medium‐early and early cultivars of cotton were grown under limited irrigation. In mid‐June of each year, the cuitivars were exposed to 2,4‐D drift from farmer applications on neighboring fields. One cultivar, Paymaster 145, consistantly showed less 2,4‐D damage and correspondingly higher yields. Gin turnout and micronaire were also negatively correlated with 2,4‐D damage, while staple length was positively correlated.
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Regier et al. (1986) studied this question.