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Grasshoppers. If populations are significant and crop feeding has begun, a spray or bait application around field edges may be enough to reduce the threat. Grasshoppers are easier to manage……
Insects other
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Flea beetles remain the single biggest insect threat this week, although pressure seems to be waning. Cutworm losses have been reported in a few fields across the Prairies, but damage is usually patchy within a field and nearby fields might not have any losses. The key with all insects is to scout and count and adhere to economic thresholds for… -
Under hot conditions the metabolism of (some) target insects is significantly faster. Control of the pest is more complete when the metabolism of the pest is slower which is generally associated with cooler or moderate temperatures. It is also known that control of some insect species with pyrethroid insecticides decreases as temperature rises. Some pests are also more available in…
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Combining pest control operations to save trips over the field may seem like good economic sense, but consider the following when making this decision… -
(1) Many insecticides have limits on how many times a year they can be sprayed on a canola crop. (2) Check approvals for all products to be used on canola…
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Flea beetle thresholds don’t change with frost, but frost may have changed the crop assessment situation. Here’s how… -
Thrips cause curled or twisted pods on canola and can also cause damage like that shown in the photo above. The good news is that economic levels of damage from thrips are very rare… -
Many canola fields are within 5 to 10 days of swathing, which limits the choices for insecticides based on pre-harvest intervals. Here are the pre-harvest intervals for insecticides registered for insect control in canola. Try the interactive PHI tool at www.spraytoswath.ca… -
To identify a problem, start with careful scouting. Use this checklist and then move on to the Canola Diagnostic Tool…
