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Questions of the Week
…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…
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Thresholds for major canola insects
…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 moreCanola Community Connections
…Pest Monitoring Network has posted its bertha armyworm map for 2023, which could be used to forecast 2024 outbreaks. Note: The map shows very low risk! WEBINAR: Saskatchewan Ministry of…
Read moreThresholds: Insect management tools
…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 moreTopics for July 21, 2021
…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 morePod eaters: Scouting tips and thresholds
…most common pod feeders in canola in Western Canada. Bertha armyworm. Credit: Justine Cornelsen Bertha armyworm Berthas come in brown, black and green shades. The green berthas are shinier than…
Read moreQuestions of the Month
…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 moreID green worms accurately
…of the field at egg laying. Bertha armyworm at a developing stage. Source: Saskatchewan Ministry of Agriculture Clover cutworm are similar in size and feeding activity to bertha armyworm. Differences…
Read moreInsect update
…canola pods. The others are lygus and bertha armyworm. Read more Further reading: AAFC Insect Field Guide Prairie Pest Monitoring Network: Bertha armyworm scouting tips Field Heroes bertha armyworm guide…
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