Williston Research Extension Center, North Dakota State University, Williston, ND 58801.
Department of Plant Pathology, North Dakota State University, Fargo, ND 58102.
Plant Dis. 2024 Feb;108(2):365-374. doi: 10.1094/PDIS-05-23-0908-RE. Epub 2024 Feb 5.
Fusarium root rot is an important disease of field pea ( var. L.) that occurs everywhere pea is grown, causing yield loss of up to 75%. Fusarium root rot is caused by a complex of species, most notably in the Pacific Northwest of the United States and in the northern Great Plains of the United States and Canada. f. sp. (Fop) was frequently isolated from peas exhibiting root rot symptoms in North Dakota during recent surveys. Fop causes wilt (races 1, 5, and 6) and near wilt (race 2) on pea. However, its contribution to pea root rot remains unclear. Fop race was determined for isolates from North Dakota pea root rot surveys. ND Fop isolates were evaluated for root rot pathogenicity and aggressiveness at standard and elevated temperatures. Results from greenhouse wilt assays indicated that all Fop races exist in North Dakota, with race 2 most prevalent among the 25 North Dakota isolates evaluated. Root rot evaluations conducted at 21/18°C and 25/19°C day/night temperatures demonstrated that most Fop isolates were as aggressive or more aggressive than and under both temperature regimes. Aggressiveness of Fop isolates tended to increase at elevated assay temperatures. Results from these experiments indicate that Fop may be an important contributor to the root rot complex of field pea in North Dakota and should be considered in integrated pest management strategies, including pea breeding efforts to improve resistance to Fusarium root rot.[Formula: see text] Copyright © 2024 The Author(s). This is an open access article distributed under the CC BY-NC-ND 4.0 International license.
镰刀菌根腐病是一种重要的田间豌豆（品系 L.）病害，普遍发生于豌豆种植区，可导致高达 75%的产量损失。镰刀菌根腐病由一个种复合体引起，在美国太平洋西北地区和美国和加拿大的大平原北部，以 和 最为常见。在美国西北部的北达科他州最近的调查中，经常从表现出根腐症状的豌豆中分离到 f. sp. （Fop）。Fop 可引起豌豆萎蔫（品种 1、5 和 6）和近萎蔫（品种 2）。然而，其对豌豆根腐病的贡献尚不清楚。对北达科他州豌豆根腐病调查中的分离物进行了 Fop 品种鉴定。评估了来自北达科他州豌豆根腐病调查的 ND Fop 分离物的根腐病致病性和在标准和升高温度下的侵袭性。温室萎蔫测定的结果表明，所有 Fop 品种都存在于北达科他州，在 25 个北达科他州分离物中，品种 2最为普遍。在 21/18°C 和 25/19°C 日/夜温度下进行的根腐病评估表明，在这两种温度条件下，大多数 Fop 分离物的侵袭性与 和 一样或更强。在升高的测定温度下，Fop 分离物的侵袭性有增加的趋势。这些实验结果表明，Fop 可能是北达科他州田间豌豆根腐病复合种的一个重要贡献者，应在综合虫害管理策略中考虑，包括提高豌豆对镰刀菌根腐病抗性的选育工作。[公式：见正文] 版权所有 © 2024 作者。这是一个在 CC BY-NC-ND 4.0 国际许可下分发的开放获取文章。
