…determining the damage potential of these species in canola to guide the need for future research. Bertha armyworm. Bertha armyworm monitoring programs are underway and counts are coming in. The…
Read more…thresholds for bertha armyworms as a guideline. (Identify green worms accurately) Cabbage seedpod weevil: are moving into non-typical areas. Scout at 10-20% flower (approximately one week after first flower) using…
Read moreBertha armyworm counts keep rising. Adult moth counts continue to accumulate across the Prairies. Many areas are now at moderate to high risk, and adult numbers will continue to build…
Read moreBertha armyworm adults are at moderate to high levels in some traps. Aster leafhopper numbers are higher than usual in some locations. Source: Chrystel Olivier, AAFC Lygus: Insecticide control at…
Read moreMature bertha armyworm. Source: Roy Ellis Bertha armyworms keep eating to within a few days of pupating. These 1.5” late-stage berthas eat much more than at smaller stages, doing a…
Read more…insects Bertha armyworm: Bertha thresholds are based on work by Bracken and Bucher, published in the Journal of Economic Entomology in 1977. They found that each bertha armyworm larvae per…
Read more…south. Green worms found feeding on canola were alfalfa loopers, not bertha armyworm. Saskatchewan: Grasshoppers exhibited localized heavy pressure. Aster leafhoppers (vector of aster yellows) were more numerous and had…
Read more…the Pests and Predators Field Guide is a recommended resource. Bertha armyworm under control Bertha armyworm is one of the most worrisome insect pests of canola, having caused severe infestations…
Read more…insects Bertha armyworm: Bertha thresholds are based on work by Bracken and Bucher, published in the Journal of Economic Entomology in 1977. They found that each bertha armyworm larvae per…
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