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Improving fungicide efficacy for management of Cercospora leaf spot in sugarbeet (Beta vulgaris L.)

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Title: Improving fungicide efficacy for management of Cercospora leaf spot in sugarbeet (Beta vulgaris L.)
Author: Thornton, Kendra
Department: Department of Plant Agriculture
Program: Plant Agriculture
Advisor: Trueman, CherylSchaafsma, Art
Abstract: Cercospora leaf spot (CLS; Cercospora beticola Sacc.) is a damaging sugarbeet (Beta vulgaris L.) disease. Field experiments evaluated the potential of InterLock deposition aid (MVO) and carrier volumes of 115, 235, 350, and 470 L ha-1 for improved management with mancozeb. Adding MVO to mancozeb did not reduce disease accumulation or improve yield or sugar quality more than mancozeb alone. Increased carrier volume did not affect disease accumulation or yield, and only slightly increased sugar purity. Additional field experiments investigated the effect of MVO on spray deposition by analyzing Rhodamine WT recovery from leaves. Using MVO with mancozeb did not improve canopy deposition compared to mancozeb alone, regardless of the nozzle or carrier volume tested. Deposition was affected by nozzle selection and increased using a carrier volume of 350 L ha-1 compared with 115 and 235 L ha-1. Larger carrier volumes showed potential to improve management, but MVO did not.
URI: https://hdl.handle.net/10214/25907
Date: 2021-06
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