Insects

3. Record what you find. With detailed records, including insects found in each field, insect numbers, what they’re feeding on, time of day, temperature

Thrips damage shows up in some fields. Bertha armyworms are the bigger issue, with adult counts continuing to build and many areas now at

Bertha armyworm moth counts continue to accumulate across the Prairies. Many areas are now at moderate to high risk, and adult numbers will continue

—Go out in early morning or late evening when larvae are mostly active. —Mark out an area a quarter-metre square (50 cm by 50

Bertha armyworm adult trap counts suggest low to medium risk in most areas this year, with a couple higher risk hot spots in Saskatchewan

Root maggots and root disease often show up together in the same field. Root maggots are white and up to 10 mm (half an

The most accurate method to estimate diamondback moth population density in canola is to count larvae in several locations throughout the field, and determine

As canola starts to move from flowering and into pod formation, growers will often notice blanks up the raceme where pods did not form.

Cabbage seedpod weevil numbers are high in some regions of southern Alberta and southwestern Saskatchewan. The map shows CSPW reach for 2012. Growers and

Many canola fields have a combination of insects feeding on the crop. An “additive” effect is possible when more than one species are feeding

Leafhopper populations are building, which could increase the risk for aster yellows. Even so, there is not really a good case for spraying for

Cutworms are spotty but keep scouting. Flea beetles may need to be controlled past the 4-leaf stage in some extreme cases this year. Cabbage