PPMN canola insect scouting chart

Flea beetles Flea beetle thresholds don’t change with frost, but frost may have changed the crop assessment situation. Here’s how: —Cotyledons that will die due to frost damage should not be a factor in the decision, even if they had flea beetle damage before the frost. Instead, check that the growing points on these seedlings…

Flea beetle scouting. Most fields will not require a foliar insecticide for flea beetles in addition to seed treatment, but you want to check to make sure. Begin monitoring right after emergence and through until at least the four-leaf stage. Seed treatment can be effective through most of this period, but slow-starting or slow-growing crops…

Diamondback moth numbers high, early Adult diamondback moth numbers are higher than usual in the southern Prairie for this time of year. Diamondback moth larvae are not a threat to canola until later in the season, and a lot can happen between now and then. Rain can drown young larvae and natural parasitoids can feed…

Flea beetles and slow-growing crop. Seed treatment is likely no longer providing protection if canola has been in the ground since mid May. If canola is growing slowly for whatever reason, a foliar spray may be required if flea beetles are still present and feeding on new growth, and if leaf area loss is above…