Digging into Research
Two grower submitted samples were confirmed to have Group 14 PPO inhibitor-resistant kochia from the RM of Newcombe in Saskatchewan and Forty Mile County in Alberta. Dose response bioassays confirmed high resistance to foliar applied Group 14 active ingredients saflufenacil and carfentrazone in a kochia population...
Dose response bioassays confirmed high resistance to foliar applied Group 14 active ingredients saflufenacil and carfentrazone in a kochia population from Kindersley and two populations from North Dakota. Herbicide-resistant kochia has become a serious problem for Prairie farmers over the last two decades. Currently, all kochia...
Fine-tune carfentrazone-ethyl application to kochia at a weed growth stage of up to 5 cm with no branches to help avoid nonlethal herbicide dosing, which can help to reduce the risk of non-target site herbicide resistance evolution. Kochia is one of the most troublesome weed on...
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...
Patch expansion was attributed mainly to natural seed dispersal or seed movement by equipment at time of seeding. Extensive seed shed from plants in patches before harvest or control of herbicide resistant plants by alternative herbicides minimized seed movement by the combine harvester. Wild oat plants...
A survey of early adopters of physical impact mills found that wild oat (60%) and kochia (50%) were the weeds most frequently mentioned as specific motivators for impact mill purchase. Average increased fuel cost for a mill was estimated at $1.40/ac, with average annual maintenance...
Fierce provided 99% visible control and biomass reduction of glyphosate-resistant downy brome 8 weeks after treatment. High rates of Focus and Heat Complete, and two rates of Authority Supreme provided excellent control greater than 90%. Glyphosate-resistant downy brome was confirmed in a glyphosate-resistant canola field in...
In winter wheat cropping systems, pre-plant weed management combined with two in-crop fungicide applications optimized grain yield. An in-crop herbicide application proved to be unnecessary, however multiple applications of fungicides were needed to optimize grain yield and grain protein concentration. Winter wheat can offer substantial economic...
Group 1 and Group 2 herbicide-resistant weed patches were widespread in Saskatchewan covering an estimated 15.315 million acres (6.198 million ha) in a total field area of 28.211 million acres (11.417 million ha). Given the linear increase in herbicide-resistant weeds, every annually cropped field in...
Single and sequential applications of glufosinate provided excellent control of Group 2 and Group 2 + 9 resistant kochia. Treatments containing sulfentrazone (which were experimental and not registered) caused excellent control but unacceptable crop injury. Layering strategies with ethalfluralin and/or carfentrazone followed by glufosinate may...
