Insects

Flea beetles feeding on canola leaves and pods are unlikely to cause an economic loss. Numbers have to be very high – perhaps 100

The three most common pod munchers are bertha armyworm, diamondback moth larvae and lygus bugs. Hot spots can sometimes be isolated to specific fields,

Scout for bertha armyworm, lygus bugs and diamondback moth larvae on pods, but only spray if insects counts are at or above economic thresholds.

The nominal threshold for canola is seven to 12 per square metre. This article provides tips on how to scout.

A few hotspots with higher bertha armyworm moth counts are showing up in Alberta, Saskatchewan and Manitoba.

The economic threshold is the density of larvae where the economic value of the yield lost due to feeding equals the cost of control.

Diamondback moth larvae are at noticeable levels in many canola fields in the Eastern and southern Interlake areas of Manitoba. But levels are generally

Insect trap counts are generally low across the Prairies, but bertha counts keep rising. Here are the latest provincial survey results.

Entomologists were excited to find a known diamondback moth parasitoid, the 2mm-long Diolcogaster claritibia wasp, at very high numbers in Alberta canola fields over

Take a random look at a few canola roots in each field to see what’s going on. Also dig up the root area for

Alberta Agriculture’s cabbage seedpod weevil survey results for 2018 are mapped. In areas with a red marker, 25% or more of samples reported are

In very dry conditions: Threshold tables for lygus indicate that if canola is $12 per bushel and spray costs $8 per acre, the threshold