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A few fields were sprayed for bertha armyworm in the past week, but these are fairly isolated cases. In general, the worms have been a low threat to canola this year. But some fields can encounter higher populations while others nearby have few or none.
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Bertha armyworm in 2014
Canola Watch Live! had two key agronomy messages with regard to bertha armyworm management in 2014: 1. Lower canola prices will mean higher thresholds for bertha armyworm. See this relationship…
Bertha armyworm: Thresholds
The economic threshold is the point where the economic value of the yield lost due to feeding equals the cost of control. Thresholds for bertha armyworm are based on larvae…
Late canola faces higher bertha armyworm risk
Bertha armyworm got its name because the worms will march like an army in search of food. As canola crops dry down and are swathed, bertha armyworms that have not…
Insect update — Bertha armyworm, thrips
Bertha armyworm moth populations continue to rise, with more areas at moderate to high risk. Scouting needs to start this week for the larvae. Check now for feeding on leaves,…
