The alfalfa weevil model predicts that oviposition is well underway in southern Saskatchewan. Figure 1 shows model output for Swift Current where first instar larvae should appear early next week.
|Figure 1. Predicted alfalfa weevil (Hypera postica) phenology at Swift Current SK. |
Values are based on model simulations for April 1-May 6, 2018.
Use the photo below as a visual reference to identify alfalfa weevil larvae. Note the white dorsal line, the tapered shape of the abdomen and the dark head capsule.