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Evaluation of Plant Growth Regulators for Effect on the Growth and Yield of Cotton

Duli Zhao and Derrick Oosterhuis


Studies were conducted in field 1993-1997 to evaluate the effect of new and existing plant growth regulators (PGRs) on growth, yield and physiology of field-grown cotton (Gossypium hirsutum L.). Treatments consisted of an untreated control and the following PGRs: Atonik, Crop+2, CCC, Cytokin, Early Harvest (EH), Maxon, MepPlus, Mepiquant Chloride (MC), PGR-IV, and PHCA. Most PGRs tested could influence plant growth and numerically increase lint yield. However, results have varied with season. Studies have also been conducted on the physiological effect of PGRs on cotton growth and yield, and are discussed in this paper. These results provide a data base for producers to use in the selection of PGR use in cotton management.

Reprinted from Proceedings of the 1998 Beltwide Cotton Conferences pp. 1482 - 1484
©National Cotton Council, Memphis TN

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Document last modified Sunday, Dec 6 1998