PMRA Re-Instates Feed Uses for Lambda-Cyhalothrin

The Pest Management Regulatory Agency (PMRA) has published an information note announcing the reinstatement of grain treated with lambda-cyhalothrin as an acceptable source of livestock feed, effective immediately. The reinstatement applies to grain and meal from treated canola, cereals, field corn, soybeans and pulses. 

This resolves the grain industry’s long-standing issue with the 2021 PMRA re-evaluation decision of lambda-cyhalothrin that cancelled all feed uses of crops treated with lambda-cyhalothrin, including the harvested grain, seed screenings, by-products and aftermath. As any crop entering the grain handling system is eligible for use as livestock feed, this posed a risk of becoming an off-label use.  

 As of February 3, 2025, 

  • Feeding of certain lambda-cyhalothrin treated crops, including pulses, oilseeds and meal, and cereal grains and milled by-products to livestock is acceptable.  
  • The use of lambda-cyhalothrin must stop on apples and peaches.  
  • The maximum number of applications of lambda-cyhalothrin on turf must not exceed two per year.  
  • Users must follow the updated labels for acceptable uses. 

Note that only Syngenta Canada and Adama Agricultural Solutions Canada products include the re-instatement of certain feed uses. A full list of affected products and summary of label changes can be found here. 

Keep it Clean provides the following tips to help keep your crops market-ready, including:   

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