Digging into Research
In Canada, 14 species of Palmer amaranth have evolved herbicide resistance against eight modes of action, while waterhemp has evolved resistance against seven. The review showed that detection and control of any populations should be executed rapidly to prevent establishment and spread of infestations into...
Light-activated sensor-controlled sprayer reduced the overall chemical use by 23% to 55% and resulted in cost savings of $2.36/ac to $12.48/ac ($5.83 to $30.83/ha) across herbicide treatments for kochia and prickly lettuce control. In recent years, light-activated sensor-controlled (LASC) sprayers have become more popular with custom...
Combine harvesting spread wild oat seeds up to 475 feet (145 m) at population levels of more than 1 seed per square foot (10 seeds/m2). This compared to less than 1 seed/ft2 at 150 feet (45 m) with chaff collection. Wild oat distribution is typically patchy...
In addition to genetic, physiological, and environmental factors, farming practices such as harvest timing, and tillage regimes can influence secondary dormancy of volunteer canola seed. Given the documented high heritability of secondary dormancy, it is feasible to reduce secondary dormancy in canola cultivars through plant...
Fall harrowing shortly after harvest increased volunteer canola seedling emergence in the fall, resulting in over-winter kill and reduced volunteer canola persistence. Volunteer canola is an on-going problem for farmers on the Prairies. This is partially because of significant harvest seed losses during combining, and also...
Integrated weed management (IWM) strategies using increased seeding rates, 2 years of early cut silage barley, and a rotation with competitive winter cereals improved control of wild oat and foxtail species (green and yellow). Treatments with IWM also improved control of lamb’s quarters, cleavers, kochia,...
Few significant differences were found in weed densities and the weed seedbank between a combine with a physical impact mill and a regular combine without the impact mill. This may have been because of the short time frame of the 3-year experiment, the high initial...
For livestock producers, kochia is relatively high in crude protein and can be used as an alternative forage for alfalfa, or ensiled and used as an alfalfa silage replacement. Integrated crop-livestock systems may offer alternative weed control methods that are effective for managing herbicide-resistant kochia...
Based on wild oat seed viability, early clipping of wild oat panicles before seeds are viable, in short-statured crops, may become a valuable tool for integrated wild oat management. Wild oat is one of the most problematic weed species in western Canada due to widespread populations,...
Seeding a tall cultivar at 80 seeds/ft2 in early May along with the application of an in-crop wild oat herbicide resulted in the greatest stand establishment and crop biomass, as well as the lowest weed biomass in flax. Flax is a poor competitor with weeds, and...
