Thursday, 4 June 2020

Predicted pea leaf weevil development

Pea Leaf Weevil (Sitona lineatus–  The phenology model for pea leaf weevil (PLW) indicates that females recently started to lay eggs (if they are present in those regions). The following two graphs illustrate the pattern of PLW oviposition for Swift Current (Fig. 1) and Lacombe (Fig. 2). 
Figure 1. Predicted pea leaf weevil (Sitona lineatus) phenology at Swift Current SK.
Values are based on model simulations (April 1-May 31, 2020).

Figure 2. Predicted pea leaf weevil (Sitona lineatus) phenology at Lacombe AB.
Values are based on model simulations (April 1-May 31, 2020).

Link here to access photos of PLW and related species of weevils which can all be active simultaneously in Canadian prairie field crops. Also access the 2019 prairie-wide distribution map for this pest at this link.

Biological and monitoring information related to pea leaf weevil in field crops is posted by the province of Alberta and in the PPMN monitoring protocol.

Also refer to the pea leaf weevil page within the "Field Crop and Forage Pests and their Natural Enemies in Western Canada: Identification and management field guide" - both English-enhanced or French-enhanced versions are available.