Evaluates fungicide dose effects on yield and disease severity in winter wheat, suggesting lower rates may be effective.
Stripe rust, caused by Puccinia striiformis f. sp. tritici, is a foliar disease of wheat characterized by yellow-orange uredinia arranged in stripes on leaves that can lead to reduced photosynthetic capacity and yield loss. Symptoms include chlorosis, necrosis, and premature senescence under conducive environmental conditions. The objective of this study was to evaluate the efficacy of fungicide dose on stripe rust severity and associated crop response metrics. A field trial was conducted in 2025 at the Oregon State University Columbia Basin Agricultural Research Center in Adams, OR, using winter wheat ( Triticum aestivum) cultivars ‘UI Magic CL+’ and ‘Mallory CL+’. Fungicide applications significantly increased grain yield compared with the untreated control, but no differences among fungicide rates were detected, indicating that reduced rates may provide comparable disease management and yield protection under moderate disease pressure.
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Hagerty et al. (2026) studied this question.
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