Importance and causal agents of root rot on field pea and lentil on the Canadian Prairies, 2014-2017 release_5ooaszormnhelfsv4sjicrvgja

by Syama Chatterton, Michael W. Harding, Robyne Bowness, Debra L. Mclaren, Sabine Banniza, Bruce D. Gossen

Published by Figshare.

2018  

Abstract

Surveys of pulse crops across the Canadian prairies were undertaken between 2014 and 2017 to assess the distribution and severity of root rot of field pea and lentil, to identify the most important causal agents, and to compare the efficiency of culturing techniques with multiplex PCR. Root rot was present in every pea and lentil field surveyed in all three provinces. When assessed based on province and soil zone, moderate to severe symptoms (severity &gt; 3 on a 1-7 scale) occurred in 25–99% of pea fields, but only 8-34% of lentil fields. Root rot severity on both crops was higher in growing seasons with high precipitation and was lower in drier years, but only lentil showed any difference associated with soil zone, with lower severity in the brown soil zone. This study demonstrated that <i>Aphanomyces euteiches</i> occurs across the Prairie region, where it caused moderate to severe injury on many field pea crops. <i>Fusarium avenaceum</i> was the most common pathogen identified in both culturing and PCR analyses, but other <i>Fusarium</i> spp., together with <i>Pythium</i> spp. and <i>Rhizoctonia solani</i>, were also components of the complex. Use of PCR for pathogen identification routinely resulted in identification of many pathogens from an infected root, whereas culturing and isolation resulted in only one or two pathogens per root. PCR was extremely important for assessing the impact of <i>A. euteiches</i>, which was almost never identified using culturing approaches. This observation explains why <i>A. euteiches</i> was not initially recognized as an important pathogen of pulses in the region.
In text/plain format

Archived Content

There are no accessible files associated with this release. You could check other releases for this work for an accessible version.

Not Preserved
Save Paper Now!

Know of a fulltext copy of on the public web? Submit a URL and we will archive it

Type  article
Stage   published
Date   2018-11-13
Work Entity
access all versions, variants, and formats of this works (eg, pre-prints)
Catalog Record
Revision: 2de8b383-5a2e-4f75-b58d-47009cb66c5f
API URL: JSON