What Happened to 2% Strychnine?
Friday, June 10, 2022
In 2018 the Federal government started the process of re-evaluating the registration of strychnine for Richardson ground squirrel (RGS) control. The evaluation included a field study which took place in Saskatchewan in 2019. This study observed the number of “off target” species that were affected or killed by application of strychnine.
Although the study found that deer mice had been the only other species affected during the field study, the PMRA (Pest Management Regulatory Agency) decided that there was too much risk to endangered species in Canada and the product should be banned.
In 2020 a three-year plan was put in place, and this was the last year retailers could place orders from manufactures. 2021 was the last year for producers to buy from retailers and as of March 2023 there will be a full ban on the use of the product.
As of now there is no alternative product that is as effective at controlling RGS’s as strychnine. Early spring application of Rozol RTU or ZP Rodent bait can be effective if done at first sightings of RGS’s prior to grass green. Shooting and trapping are some other options available, but landowners must ensure it is legal, safe, and practical in the areas they are performing control.