Thursday October 30, 2014

Rodent resistance: what you need to know.

Rodent resistance: what you need toknow.


PestManagement Professionals (PMPs) that continually rely on one rodenticideproduct can produce unintended consequences. Rodents can develop resistancewhen feeding on a single product over time, even if it was previously effectiveand well-accepted.


Rodent resistancegenerally falls into two categories:


·       Technical resistance: A loss of efficacy in which a rodenticide is applied correctly, butthere is no acceptable control of the rodent population. This resistance is dueto a heritable trait that makes rodents less sensitive to a rodenticide.


·       Behavioral resistance: A loss of efficacy caused by bait avoidance. This may be dueto recognition that the bait is toxic, changes in food preferences or inheritedavoidance of an ingredient in the bait, such as a sugar.


To help avoidthe development of resistance in rodents, PMPs should utilize Integrated Pest Management(IPM) principles including inspection, sanitation and exclusion. Rodenticidesshould be rotated over time to help minimize the risk of resistance development.When relying on second generation anticoagulants as primary control tools,rotate between active ingredients during the year, including at least oneproduct containing brodifacoum, suchas Talon®-G rodenticide or Weatherblok® XT rodenticidefrom Syngenta.


Rememberthat any factors can render a rodenticide application ineffective, such as poorplacement or contamination. A product that appears to be ineffective does notnecessarily entail a resistant rodent population.


In 1979, Syngentawas the first U.S. manufacturer to register Talon-G, a second generationanticoagulant rodenticide with brodifacoum.More than 30 years later, Syngenta will unveil a new rodenticide product underthe brand name Talon Ultrablok, which uses advances in food science to helpimprove palatability, making it one of the most attractive brodifacoum formulations on the market. This product featuresinnovative packaging and high acceptance that can control rodents in a singlefeeding, including warfarin-resistant rodents. Talon Ultrablok joins theSyngenta portfolio of other effective rodent control products, includingTalon-G and Weatherblok XT.


Rodent resistance does not mean theend of rodent control. Knowledge of IPM practices, product rotation and treatmentoptions can help manage resistance and keep customers’ lives free from rodents.


To learn more, please visit

©2014Syngenta. Important: Always read and follow label instructions. Some products maynot be registered for sale or use in all states or counties. Please check withyour state or local Extension Service to ensure registration status. ForLife Uninterrupted, Talon®, Weatherblok® andthe Syngenta logo are trademarks of a Syngenta Group Company. Syngenta CustomerCenter: 1-866-SYNGENT(A) (796-4368).