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Rotation for risk management
…prevent outbreaks of this pest. Other factors Disease and insects Sclerotinia stem rot, verticillium stripe and flying insects – flea beetle, bertha armyworm moth, diamond back moth, cabbage seedpod weevil…
Read moreSearch Results for: bertha
Four the week
…if canola is growing vigorously and has good moisture conditions. Low bertha. Trap counts for bertha armyworm adults are fairly low across the Prairies, except for a few hotspots in…
Read moreInsect thresholds: Quick review
Here is a review of thresholds for the four major insects found in canola in the last half of the season. Bertha armyworm: If canola is $12 per bushel and…
Read morePre-harvest disease scouting: 8 diseases to look for
…should have been. Look for other insect damage to pods. Debarked pods (indicating bertha armyworm feeding), larger holes in pods (which could be from diamondback feeding or bertha armyworm feeding)…
Read moreChlorpyrifos – Timeline for cancelation
The Pest Management Regulatory Agency (PMRA) is phasing out the crop uses for chlorpyrifos (in products Lorsban, Pyrinex, Nufos, Warhawk, etc.). These products provide control of bertha armyworm, alfalfa looper,…
Read more2016 in review: The long harvest
…for insects, flea beetles were normal, cabbage seedpod weevil were also normal to above average, and late-season threats lygus, diamondback moth and bertha armyworm were almost nonexistent. The few bertha…
Read moreInsect update: Spray or not?
…to use a product with an appropriate pre-harvest interval. Two good follow-up questions. Flea beetles on canola pods. Small berthas. We’ve heard of some fields with bertha numbers that exceed…
Read moreNeed to spray insects this late?
Bertha armyworm larva (various stages) captured in plastic container. Scouting for bertha armyworm can be tricky when scouting during the heat of the day. Click here to view a short…
Read moreDiamondback moth larvae — Thresholds
Bertha armyworms are like cows. Diamondback moth larvae are like gophers. They both consume plants, but you need a lot more diamondbacks to cause an economic level of damage. Roughly…
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