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On-going Fungicide and Growth Regulator Efficacy Research in Louisiana Peanut

Applied Research

Trey Price
Associate Professor - Field Crop Pathology
LSU AgCenter
Winnsboro

Abstract

At the request of growers and with funding from the National Peanut Board, we have been investigating fungicide application timing and efficacy as well as growth regulator effects in peanut in Louisiana.  On-farm efforts at five locations during 2021 and 2022 included comparisons of two applications of tebuconazole (7.2 fl oz/A) against one application of Elatus (9.5 oz/A) for Southern stem rot (white mold) management. Two applications of the growth regulator, Kudos (5.4 oz/A), also were compared to non-treated plots.  Treatments were applied after canopy lap and at first sign of white mold.  Treatments were as follows:  tebuconazole (7.2 fl oz/A) applied twice, Elatus (9.5 oz/A) applied once, Elatus applied once plus Kudos (5.4 fl oz/A) applied twice, and Kudos applied twice.  Significantly lower disease incidence was observed in fungicide-treated and Kudos-only treated plots compared to the non-treated control.  Plots treated with Kudos had significantly higher row definition compared to the non-treated and Elatus only.  Plots with no treatment yielded the lowest, and plots that were treated trended higher yields.  Small plot fungicide and growth regulator efficacy trials were initiated in Winnsboro and St. Joseph, LA during the 2021 and 2022 growing seasons. Eleven labeled fungicides were applied to GA-06 plots at both locations. Stem rot incidence and severity was low and highly variable at both locations; therefore, results were inconclusive. Five rates of Kudos ranging from 1.8 to 9.0 fl oz/A were applied twice to GA-06 at both locations. In St. Joseph, row definition significantly increased with growth regulator rate, and in Winnsboro data trended the same. Unfortunately, harvest was impossible at both locations because of equipment issues. On-farm and small plot research continues during the 2023 season with equipment upgrades during the off-season.

Poster has NOT been presented at any previous NACAA AM/PIC

This poster is being submitted for judging. It will be displayed at the AM/PIC if not selected as a State winner. The abstract will be published in the proceedings.

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Authors: Trey Price, Boyd Padgett, Myra Purvis, Dustin Ezell, Bruce Garner, R. L. Frazier, Dennis Burns
  1. Price, T. Associate Professor - Field Crop Pathology, LSU AgCenter, Louisiana, 71295
  2. Padgett, B. Professor, LSU AgCenter, Louisiana, 71302
  3. Purvis, M. Research Associate, LSU AgCenter, Louisiana, 71295
  4. Ezell, D. Research Associate, LSU AgCenter, Louisiana, 71295
  5. Garner, B. County Agent, LSU AgCenter, Louisiana, 71263
  6. Frazier, R. County Agent, LSU AgCenter, Louisiana, 71282
  7. Burns, D. County Agent, LSU AgCenter, Louisiana, 71366