Evaluation of seed applied plant growth regulators on cotton germination, emergence, and growth
Becker, William David
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Several PGRs, each with numerous formulations, are registered for use in cotton as foliar, seed treatment, or in-furrow applications. Manufacturers of these PGRs purport beneficial plant responses, which include more rapid germination and emergence, increased root and shoot development, increased ability to withstand various stresses, as well as increased yields. Research investigating the effects of PGRs on early season growth of cotton has shown inconsistent results. Fungicides and insecticides are routinely applied to cottonseed prior to planting because of the convenience this method of application affords. This same convenience might prove beneficial for PGR applications, but research investigating the effects of seed applied PGRs has also shown inconsistent results. Thus, the objective of this study was to investigate the effects of several commercially available plant growth regulators on germination, emergence, and early season growth of cotton when applied as seed treatments at 0.5x, 1 .0x, and 2.0x the manufacturer's recommended rates.