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. 2021 Jul 20;12:677631. doi: 10.3389/fpls.2021.677631

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Copyright © 2021 McCaghey, Shao, Kurcezewski, Lindstrom, Ranjan, Whitham, Conley, Williams, Smith and Kabbage.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Pathogen aggressiveness was reduced in virus induced gene silencing (VIGS) assays. Plants containing VIGS silencing constructs (pBPMV-OA) and empty vectors (pBPMV-EV) were challenged with S. sclerotiorum strain 1980, using a cut petiole technique. Lesions were measured 1–5 days post inoculation (DPI). Data are the result of five biological replicates and three experimental repetitions. (A) Lesion development was delayed, and lesions were smaller in plants containing pBPMV-OA, while plants containing pBPMV-EV often showed girdling lesions at 96 h post inoculation (HPI). (B) Lesion size was reduced after two DPI, with an overall reduced lesion size (*p < 0.01). (C) The overall area under the disease progress curve was lower in plants containing pBPMV-OA (*p < 0.01).