Digging into Research
A seeding rate of 50% chickpea and 50% flax resulted in maximum combined yield and land productivity, and reduced Ascochyta blight disease severity by 50 to 67% compared to monocrop chickpea, but flax competed with chickpea and reduced chickpea yield. Ascochyta blight, caused by Ascochyta rabiei,...
Aphanomyces root rot severity increased when oospore levels rose above 100 oospores per gram of soil. Below this level, Aphanomyces root rot did not develop in most soil types. Aphanomyces root rot, caused by the oomycete pathogen Aphanomyces euteiches, was first confirmed in Saskatchewan and Alberta...
The optimum conditions for infection by Botrytis cinerea, the most common pathogen causing blossom blight in alfalfa in Canada, was a temperature between 15C and 20C with 12 to 24 hours of surface leaf wetness at flowering. Alfalfa seed production on the Prairies can be impacted...
In small plots and greenhouse conditions, blackleg severities on 2 canola hybrids were generally higher when Leptosphaeria maculans was co-inoculated with Verticillium longisporum than when L. maculans was applied alone. Blackleg disease, caused by L. maculans, has been an important disease in western Canada for many...
Researchers explored FHB management strategies focusing on a systems approach of Genotype (G) x Environment (E) x Management (M) interactions. They reviewed current literature, and included a recent western Canadian FHB research project as a case study of this approach. The results showed that a...
Using a cultivar with greater disease resistance and applying a fungicide reduced leaf spot diseases in winter wheat. Fungicide application resulted in a 3.3 to 13.2% (2 to 8 bu/ac) yield increase over the untreated check. Leaf spot diseases are commonly seen on winter wheat in...
Research found that foliar fungicide application at early anthesis for Fusarium Head Blight control also provided adequate control of leaf spotting diseases. While leaf spotting diseases were slightly higher at this timing, yields were similar. In years when environmental conditions are favourable, leaf spot disease can...
Mechanical wounds on canola cotyledons, simulating flea beetle feeding, allowed infection of the blackleg pathogen while no infection occurred on un-injured cotyledons. Wounds that were 8 hours or older before inoculation had lower levels of infection. Temperature, leaf wetness and relative humidity also played a...
The application of hydrated lime to bring an acidic soil up to pH 7.2, and/or weed control of cruciferous weeds did not affect clubroot severity on a clubroot resistant variety. The yield of a susceptible canola variety almost doubled with the application of hydrated lime,...
Yield losses to clubroot disease, caused by Plasmodiophora brassicae, increased linearly as the Disease Severity Index (DSI) increased. Under greenhouse conditions, an increment of 1% in DSI resulted in a decrease of 0.9% to 1.0% in yield; under field conditions, this percentage was reduced to...
