Abstract Detail

Recent Topics Posters

Brar, Gurcharn [1], McCallum, Brent [2], Gaudet, Denis [3], Fernandez, Myriam [4], Puchalski, Byron [3], Kutcher, R [5].

Stripe rust disease dynamics in southern Alberta, Saskatchewan, and Manitoba, 2009-2014.

Stripe rust of wheat, caused by Puccinia striiformis f. sp. tritici, is one of the most devastating diseases of wheat worldwide. Until 2000, incidence of stripe rust was limited to the irrigated areas of southern Alberta. However, after 2000, the disease was frequently observed in Saskatchewan and most of Alberta.  In 2009 and 2010, stripe rust was widespread in eastern Saskatchewan but severity levels were low. In 2010, in southern Alberta, severe levels of stripe rust were observed on susceptible varieties AC Bellatrix, CDC Abound and Superb. Trace to low levels were observed on resistant varieties Harvest, CDC Go and Lillian. Severe infection was reported on seedling resistance gene Yr10 (carried by AC Radiant) for the first time. Stripe rust was epidemic in 2011 in southern Alberta and Saskatchewan. High moisture in spring wheat created favourable crop canopy conditions in addition to preventing timely fungicide application, which resulted in high levels of secondary inoculum. The 2011 epidemic caused wheat growers to choose stripe rust resistant varieties and encouraged unwarranted fungicide application in 2012, even though stripe rust occurrence and severity were low. In 2013, disease was widespread but generally not a significant problem for Saskatchewan wheat growers. In 2014, stripe rust was observed only in south-western Saskatchewan and at trace or low levels. Severe infections were observed only in susceptible varieties in southern Alberta in 2014. Stripe rust in MB in 2009, 2010, 2012, 2013 and 2014 was at trace levels. Stripe rust was severe, early in the season, in MB in 2011. 

1 - University of Saskatchewan, Plant Sciences, 51 Campus Dr., Agriculture Building, Saskatoon, SK, S7N 5A8, Canada
2 - Cereal Research Centre, Agriculture and Agri-Food Canada, 101 Route 100, Morden, MB, R6M 1Y5, Canada
3 - Agriculture and Agri-Food Canada, Lethbridge, AB, Canada
4 - Semiarid Prairie Agricultural Research Centre, AAFC, Swift Current, SK, Canada
5 - University of Saskatchewan, Plant Sciences, 51 Campus Dr., Saskatoon, SK, S7N 5A8, Canada

Keywords:
stripe rust.

Presentation Type: Recent Topics Poster
Session: P
Location: Hall D/The Shaw Conference Centre
Date: Monday, July 27th, 2015
Time: 5:30 PM
Number: PRT007
Abstract ID:1785
Candidate for Awards:None