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Red turnip beetles are eating large patches in a few fields in central Alberta. Red turnip beetles eat plants from the brassica family only, and they are sometimes — though rarely — an economic pest in canola…
Insects
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Cabbage seedpod weevils move to canola fields at the bud to early-flower stages. While they will feed on buds and destroy some of them, spraying is rarely recommended before 10% bloom… -
Can you go 4 for 4 on this worm-themed quiz?…
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Some fields are thinned by cutworm, diamondback moth larvae are at work but control is not usually required at this crop stage and swede midge are early in Ontario… -
With hot, dry conditions, canola seedlings already under pressure from intense flea beetle feeding dried out and died… -
Test your cutworm knowledge. Answers to these five questions are found in the new guide, "Cutworm Pests of Crops in Western Canada" from Agriculture and Agri-Food Canada…
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Why scout? Reason one: To confirm that cutworms are the cause. For example, fungal seedling diseases can cause seed and seedling decay that can lead to patches of missing plants Reason two: To identify the cutworm species present as this can influence management decisions. Underground-feeding cutworms are less likely to encounter spray, for one thing. And thresholds vary by species… -
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…
