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Usually by the end of June, most of the cutworms that overwintered as eggs or partly grown larvae (including redbacked, as shown in this John Gavloski photo) have pupated and are no longer a risk to crops. In early and warm springs, cutworms will often pupate earlier in June. In cooler spring, cutworm activity often carries into July before pupation…
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Higher than normal cutworm feeding has been reported in some locations. This could be due to various factors, including the long fall, early spring and weed growth to provide food through these times. Here are scouting techniques to follow while inspecting canola fields for cutworms…
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Cutworms and seedling diseases are fairly common causes for toppled or missing plants this time of year. Here are a few tips to help you distinguish which is at work…
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How well can you identify the most common cutworm species found in Canadian canola crops?…
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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…
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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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Cutworm scouting begins with a walk through the field looking for bare patches, chewing damage in foliage, or clipped plants. Cutworms and cutworm damage is one thing to look for while scouting this week…
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Flea beetle thresholds don’t change with frost, but frost may have changed the crop assessment situation. Here’s how…
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