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Early weeds have large impact on canola yield potential. Research has shown a yield advantage of 3 bu./ac. when weeds are removed at the 1- to 2-leaf stage of canola instead of waiting until the 3- to 4-leaf stage. That advantage rises to 7 bu./ac. when comparing weed control at the 1- to 2-leaf stage versus the 6- to 7-leaf…
Canola Watch Posts
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Cool, windy, wet weather can delay flea beetle emergence. Peak emergence of the crucifer flea beetle occurs when ground temperatures reach 15°C, which is why perhaps it seems numbers are lower in many areas so far this year. They just haven’t come out yet in large numbers… -
A few flea beetles in a field are not worth the time and investment to spray. They will not cause economic losses. Only when defoliation reaches 25% across the field and feeding pressure continues does it make sense to spray for flea beetles…
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One plant count after emergence may not be enough to tell you about seed survival and whether the seeding rate and seeding tool did the job it was supposed to do. Seedling diseases, flea beetles, frost and other factors can influence seed survival, and unless scouting and counts are done repeatedly through the first few weeks after seeding, these influences… -
Rain after seeding can often cause top soil to crust, stopping the emergence of canola seedlings. Canola seedlings can’t penetrate the crust, and often curl back and die. No research has been conducted to show the best ways to break up crusting and free the crop. If a few plants have emerged, it may be best to leave them be…
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We had two questions in the past week about top-dressing fertilizer after seeding. 1. How early is too early to top dress? 2. Does adding S stabilize N against losses?…
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While doing your emergence scouting, here are a few things to look for…
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About a week after seeding, growers and agronomists can start to evaluate stands to make sure they’re emerging as expected. Look throughout the field for issues that could be related to drill performance, frost, excess moisture, insects or disease… -
Weather delays for seeding and spraying make it all the more important to have equipment ready to go and running smoothly when productive moments come along. Here are a few preparations to consider for the drill and sprayer…