Insect control products are re-evaluated by the Pest Management Regulatory Agency (PMRA) to ensure products continue to meet health and safety standards and environmental standards. There are cyclical reviews, which occur 15 years after initial registration and special reviews, which can be triggered by significant concerns both in Canada and in other Organization for Economic Co-operation and Development (OECD) countries.
In September 2017, PMRA put lambda-cyhalothrin, the active ingredient in Silencer 120EC, Matador 120 EC and Labamba and one active in Voliam Express, under review over 90-day consultation period. These products are used to control flea beetles, grasshoppers and cutworms, among other pests. It was proposed from this review that lambda-cyhalothrin be removed for use on feed and some food commodities in April 2021. The evaluation found that livestock feed use was unacceptable resulting in ADAMA and Syngenta putting a hold on products containing lambda-cyhalothrin so that they can update labels.
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