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A few days of summer-like conditions have weeds thriving, taking up nutrients and topsoil moisture. Whether canola is already emerging, seeded but not emerging, or not yet seeded, now is a good time to remove that costly weed competition. Here are some options for each of those three situations…
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Farmers will want to test escapes for glyphosate resistance so the weeds can be targeted for intense management before they start to shed their seeds…
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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 0.5l of glyphosate on it?…
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Important clues that a patch of weeds are herbicide resistant: One, the patch has no clear boundary. Two, the patch will be one species of weed that escaped the spray…
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A second in-crop spray only makes sense if weeds are plentiful, at the same stage or ahead of the crop and the canopy hasn’t closed. These weeds may have a large yield impact. This could be a common situation when dry conditions have hampered crop growth…
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Six questions about herbicide resistant weeds – causes and management…
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If weeds are present, then yes, you should spray. In some ways, dry conditions should do more to encourage early spraying because you don’t want weeds taking up what moisture is there…
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We know that weed competition can greatly reduce canola yield. A combination of pre-seed weed control and one in-crop application before the 4-leaf stage of the crop is often enough to eliminate yield loss from weed competition…
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Flixweed, shown above, presents another possible risk – as a clubroot host. This adds to the incentive to spray it early…
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