Alfalfa weevil

Alfalfa Weevil (Hypera postica) – As a result of warmer temperatures in Saskatchewan (compared to Manitoba), AAW development is predicted to be greater in Saskatchewan.  The following graphs indicate, based on potential number of eggs (red line), that development is more advanced near Saskatoon (Fig. 1) than Brandon (Fig. 2).

Figure 1. Predicted alfalfa weevil (Hypera postica) phenology at Saskatoon SK.
Values are based on model simulations (April 1-May 11, 2020).

Figure 2. Predicted alfalfa weevil (Hypera postica) phenology at Brandon MB.
Values are based on model simulations (April 1-May 11, 2020).

 Alfalfa growers are encouraged to check the Alfalfa Weevil Fact Sheet prepared by Dr. Julie Soroka (AAFC-Saskatoon).  Additional information can be accessed by reviewing the Alfalfa Weevil Page extracted from the "Field crop and forage pests and their natural enemies in western Canada - Identification and management field guide" (Philip et al. 2018). The guide is available as an English-enhanced or French-enhanced version.