Optimizing Wheat Fungicide Management
Applied Research
Jenny Carleo
Area Specialized Agent
NC Cooperative Extension
Statesville
Abstract
Fungicides are a significant input cost intended to protect yield and grain quality. This study investigates different fungicide application timings and modes of action to identify which fungicide approaches are most cost-effective for growers of soft red winter wheat in North Carolina. Small plots were planted at research stations in Salisbury, NC in 2020 and 2021, and in Kinston, NC in 2022 and 2023. No significant fungal diseases appeared in the test in the first two years and no economic benefit was found from applying fungicides in the absence of disease. In the 2022-2023 growing season, however, multiple diseases were observed in the plots. Disease severity ratings were conducted for powdery mildew, Septoria nodorum blotch (SNB) and leaf rust. Profit for each experimental treatment was calculated for the 2022-2023 growing season by calculating the local price/bu x yield. The input costs for fungicide management were then subtracted accordingly. They included the cost of the fungicide at the labeled rate, the cost of application, yield reduction for tire tracks and any dockage received for low test weight. When examining revenue, the only significant factor was timing (P=0.01). The treatments with applications at both top-dressing and flowering were the most profitable in the year with high disease pressure.
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: Jenny Carleo, Christina Cowger
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Carleo, J. Area Specialized Agent, NC State Extension, North Carolina, 28687
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Cowger, C. Small Grains Pathologist, USDA-ARS and NC State University, North Carolina, 27695