Eight questions this week – four on agronomy as it relates to weed management and four on weed identification.
Weed management timing — scenarios
Early weed control is preferred because nutrient and moisture taken up by weeds means less for the crop. Weeds emerging before the crop also compete for sunlight, which is an issue if those weeds canopy over the crop. Ideally, growers want crop emerging in a clean field so it can get ahead of the weed…
Grassy weed control in HT canola
Grassy weeds are getting ahead of the canola in some fields. Timely weed control is essential. Tips for grassy weed control in glufosinate resistant (Liberty Link) canola: Liberty works best when applied with water volumes of 10 gallons per acre and when temperatures are warm. Most control issues for herbicides that rely heavily on contact…
Canola Watch quiz – Weed management
Test your weed management knowledge with these eight questions.
Reader question: Late weed applications on stagey canola
Question: I have a field that is fairly dirty with kochia, cleavers and lamb’s-quarters. Half of the field is in 6-leaf and half is staring to bud. How much yield will I lose by spraying 0.5 litre of glyphosate on it? Answer: Yield loss from late glyphosate applications can range from minimal to significant. A…