Foxtail barley has proliferated in some fields that were unseeded last year due to excess moisture. If it’s in patches, tillage may be the best way to control it. Pre-seed applications when shoots are small and all energy is moving upward through the weed are not always that effective. Waiting until the foxtail barley is bolting may provide a better…
Weeds
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Even if growers don’t expect to seed any time soon, they may want to consider a pre-seed burnoff now to get weeds at smaller stages and before they draw down moisture and nutrients that their canola crops will need. Products registered for use ahead of canola are CleanStart, Amitrol 240 and glyphosate…
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Canola volunteers with resistance to more than one herbicide are probably more common than you think. If you’ve only grown Liberty Link canola, for example, but your pre-seed glyphosate treatment doesn’t seem to be getting all the volunteers, the volunteers may have resistance to both Liberty and glyphosate…
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Nutrient carryover is a common question from growers with unseeded acres. The standard answer is: Nitrogen is always variable throughout a field, and after a wet year without a crop, reserves might actually be better on the hilltops than in low spots. In low areas flooded for long periods, lack of oxygen limits microbial breakdown of organic matter. Therefore nutrients…
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Read on for tips to reduce the risk of selecting for resistant weeds on your farm…
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Lack of crop diversity can increase the density of pests in a field. The higher the population of a pest in a field, the higher the risk of developing resistance to the pesticides (herbicide, fungicides or insecticides) used for controlling the pest in those fields…