Researchers investigated the efficacy and durability of canola lines carrying single and multiple clubroot resistance (CR) genes against 'new' and 'old' pathogen pathotypes. Stacked CR genes of different modes of action improved resistance and enhanced durability. Cultivar resistance is a cornerstone of clubroot management. Most canola...

In this study, foliar phosphorus (P) application was unable to substitute for seed-placed P. Overall, foliar P had a marginal effect on grain yield, P uptake and seed nutritional value. Generally, little research has been conducted in western Canada to assess the potential of foliar-applied phosphorus...

A sprayable micronized elemental sulphur fertilizer applied prior to seeding showed potential for correcting nutrient deficiencies in canola compared to application of ammonium sulphate fertilizer. However, not even ammonium sulphate resulted in a significant difference in yield due to constraints of dry or excessively wet...

All 15 PRE followed by POST herbicide combinations provided better control of volunteer canola compared with the glyphosate-only control, but tribenuron (i.e. Express SG) followed by bentazon, and tribenuron followed by imazamox plus bentazon (i.e. Viper ADV) provided solutions that were low cost, registered in...

A meta-analysis of canola yield response to plant densities found that the economic optimal canola plant stand is 6 to 7 plants per square foot assuming recent 3 year average hybrid seed cost of $11.84/lbs., and farmgate canola price of $10.22/bu, hybrid seed size of...

For this study conducted in southern Alberta on irrigated and dryland plots, the precision planter with 12 inch spacing increased seedling emergence and plant stand density compared to an air drill on 12-inch spacing or precision planter with 20 inch spacing — as long as...

Application of foliar fungicides at the 2 to 4 leaf stage reduced blackleg disease incidence and severity, and improved yield on the susceptible Westar canola cultivar. On two resistant cultivars, however, this fungicide treatment reduced the disease but showed no yield benefit. Since resistant canola...

Research showed no reduction of seed yield for Brassica napus canola at any infestation level of flies or eggs. Root maggots may be more of a perceived than real threat to Prairie canola producers. Recent wet field seasons across much of the Prairie provinces have renewed...

Yield losses increased from 18% to 99% in the hybrid canola ‘73-15RR’ and 26% to 86% in hybrid ‘1950RR’ when disease severity rose from 2 to 5 compared with plants with severities of 0–1. Understanding the yield loss relationship with blackleg severity will help agronomists...

Research conducted over the past decade set the foundation for today’s clubroot management practices. This research covered the potential of biofungicides/fungicides, cultivar resistance, and crop rotation for management of clubroot disease caused by Plasmodiophora brassicae. Synthetic fungicides ineffective The fungicides Allegro and Omega (fluazinam) and Ranman (cyazofamid)...