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Four the week
…Bertha armyworm numbers are generally low, but isolated hotspots can pop up. Don’t be caught by regional complacency. Lygus seem to be plentiful in some regions this week, but that…
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Diamondback moth larvae — Thresholds
…can pay off. Diamondback moth larvae are small and cannot do the rapid damage that bertha armyworms can do. If diamondback moth larvae are at thresholds, waiting a couple of…
Read moreJuly 23 Quiz
1. What two insects require sweeping netting to match field populations with economic thresholds? Choose two from the list. Bertha armyworm Cabbage seedpod weevil Diamondback moth larvae Grasshoppers Lygus 2….
Read moreMap of the week
This zoomed in section of the Alberta bertha armyworm map shows the only location across the Prairies, to date, showing a “severe” level of adult moths. That location is at…
Read moreBee BMPs
…and spiders that are predators that destroy the insects, such as bertha armyworm, which are feeding on and damaging the canola crop. Additionally, reducing the level of pollinators in your…
Read moreMap of the week
This map from Agriculture and Agri-Food Canada shows the regions where growing degree days (Base 7°C) have reached sufficient levels to trigger emergence of bertha armyworm adults from pupae. Adults…
Read moreTopics for the month
…took our photo (see above) and tweeted that it was the record longest panel. The discussion included talk about crop rotation, swede midge, bertha armyworm thresholds, pollinator protection, and how…
Read moreInsect update: Late flea beetle questions
…such as exposed leaves. Bertha armyworms will move from drying material to greener fields. When is canola past risk? Depends on the insect, time of year, neighbouring crop susceptibility, and…
Read moreIssues of the week
…time now to identify which disease is responsible. This is essential for management next year. Late canola fields may be at continued and higher risk for bertha armyworm feeding, especially…
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