In a previous study (Project Code: CARP2006-02) AAFC researchers determined the race structure of Leptosphaeria maculans, the species responsible for the most damaging symptoms of blackleg of canola in Canada.
It is well known that a contact herbicide such as Liberty is less effective on hard-to-wet weeds such as wild oat or cleavers. Wild oat control can be improved by tank-mixing with a Group 1 graminicide; however, there are no tank-mixes that will improve control of cleavers.
Producers have noted much more severe infestations of seedling blight and root rot in canola fields. Researchers conducted both field and greenhouse studies from 2007 to 2010 to identify the organisms associated with the increased incidence of root rot in hybrid canola crops, and to determine how to optimize cultural methods to reduce the impact of seedling blight and root rot on canola seedling populations and on plant yield.
Previous research conducted from the 2007 to 2009 by the Richardson’s Ground Squirrel (RGS) (RGS; Spermophilus richardsonii) Research Program in search of effective and socially acceptable toxicants, has provided a greater understanding of ground squirrel populations and control methods.
Herbicide tolerant (HT) canola was introduced in Western Canada in 1995 through an identity preserved production and marketing system, with unrestricted commercial production beginning in 1997. The subsequent adoption was relatively rapid, with 26% in the initial year, 78% by 2002 and 95% by 2007.
In 2009, weather conditions during the cropping season delayed canola development and fall harvest into October and November.
Researchers in Saskatchewan initiated a three-year project in 2010 to try to answer the question of how producers could respond when faced with low plant populations in hybrid canola due to poor stand establishment, spring frost, or pest damage.
Sclerotinia stem rot, caused by Sclerotinia sclerotiorum, is a disease problem of canola world wide causing serious yield losses especially under wet weather conditions. Sclerotinia resistance has been a long-time goal of canola breeders and producers.
Yield losses from infestations of root maggots (Delia spp.) can be severe in canola crops in central Alberta.
Nitrogen fertilizer is a major input cost in canola (Brassica napus L.) production and farmers are interested in improving nitrogen use efficiencies.
Field trials and grower experiences alike have shown that, while it is not uncommon to straight-combine canola successfully, substantial yield losses can occur and have been reported as high as 50% relative to swathing.
Sclerotinia stem rot, caused by Sclerotinia sclerotiorum, is a serious disease problem of canola worldwide. The long term objective for researchers at Agriculture and Agri-Food Canada is to provide the canola industry with specific resistance genes and molecular markers as a selection tool used by plant breeders for selection of stem rot resistant canola cultivars.
