Evaluating Plant Growth Regulators on Georgia Peanut Varieties
Applied Research
Savannah Tanner
County Extension Agent
University of Georgia
Swainsboro
Abstract
Peanut production in the southeastern portion of Georgia continues to evolve as newer runner-type varieties with greater vine growth are adopted. Varieties such as Georgia-12Y, Georgia-16HO, and Georgia-18RU have demonstrated strong yield potential but often produce excessive vegetative growth that can complicate digging, reduce harvest efficiency, and limit airflow within the canopy, which reduce yields. A multi-year research effort was conducted at the Southeast Georgia Research and Education Center (SGREC) at Midville to evaluate the use of the plant growth regulator prohexadione calcium (Kudos) on prominent peanut varieties. The research conducted in 2023 and 2024 evaluated variety response of Kudos by comparing treated and untreated plots. Varieties evaluated included: AUNPL-17, Georgia-06G, Georgia-12Y, Georgia-16HO, and Georgia-18RU. For both years, treated plots averaged 6,094 lbs./A, while untreated plots averaged 5,674 lbs./A. This equated to a yield advantage of approximately 420 lbs./A. Georgia-12Y showed the greatest individual yield response, while Georgia-06G showed the least. Once the researchers got an understanding of how the different varieties performed with the PGR, a study evaluated multiple application timings and rates of Kudos on Georgia-12Y. These timings consisted of the standard rate applied earlier, a lower rate applied earlier fb two additional treatments of the medium rate, and the standard extension recommendation of 5.4 ozs/A beginning at 65 Days After Planting (DAP) fb the same rate at 80 DAP. Results indicated that while PGR applications helped manage vegetative growth and improved harvest efficiency, altering rates or applying earlier did not improve yield beyond the standard Extension recommendation. These findings confirm that the standard two-application program remains an effective and practical strategy for managing excessive vine growth in newer peanut varieties grown in southeastern Georgia.
Poster has NOT been presented at any previous NACAA AM/PIC
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Authors: Savannah Tanner, Wade Parker , Steven Powell
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Tanner, S. County Extension Agent, UGA Extension Agent , Georgia, 30401
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Parker , W. SED Agronomist , UGA Extension , Georgia, 30458
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Powell, S. CEA , UGA Extension , Georgia, 30457