Insects

Second generation lygus have arrived. Young nymphs will reach late instar and adult stages in 5 to 14 days. When scouting to see if

Some fields may have a variety of green worms feeding, including bertha armyworm, diamondback moth larvae, imported cabbageworm and alfalfa looper. Here’s how to

We don’t have scientific evidence to combine thresholds, but where an “additive” effect of multiple species can make sense is when more than one

Lygus, bertha armyworm and diamondback moth have a number of natural enemies that will keep populations in check. These beneficial insects may not control

Include nymphs (shown above) when doing lygus sweep net counts. Bertha risk rising. Zebra caterpillers are usually confined to small areas within a field.

Keep in mind pre-harvest intervals for fungicides and insecticides now that many early seeded crops are less than a month from swathing. Pre-harvest intervals

An AAFC study has shown very clearly that with continuous canola, there is a statistically significant increase in crop damage by root maggots. No

Our current economic threshold tables for lygus in canola may be too low when applied to current canola production systems across the Prairies. If

Leafhoppers are more plentiful and carrying more aster yellows phytoplasm this year, but spraying is rarely effective. Bertha counts are starting to spike in

If you have lygus bug and cabbage seedpod weevil in the same field and if they are both at 50% or more of their

Insects, heat stress, hail and sulphur deficiency can all cause bud discoloration and damage. Scouting closely for insects may be required to find out

Check to see if lygus feeding is preventing crop from coming into flower. Bertha armyworm adults are mounting and larvae will start to hatch