Interpreting Pyrethroid Labeling

Wednesday July 4, 2012


Mr Pest Control


I first want to say that I am enjoying the updates to the Master Technician series. Thank you for your vigilance in making this a current resource. Next, my question. With the change in the labeling for synthetic pyrethroids I need to confirm or maybe update my understanding of spot treatments. I have a long history in the industry and in the past I believe it was acceptable to string spot applications side-by-side together, relying on an accepted not-to-exceed percentage of a given surface of the application. At this point, I have a concern with the validity of the spot treatment percentage issue and the demands of the new labeling. Specifically, the limitations for use around the exterior of the home at windows and doorways. My question is this: Is it currently considered a compliant application if spot treatments are attached side-by-side as long as the areas of the spots combined does not exceed a certain percentage of the given surface? Thank you for your input on this concern.

Mr Pest Control


Good morning Eddie, and thank you for the compliments. I see you are in Colorado, so I hope you and your home are safe from the awful fires. 

We discussed this "spot" treatment definition in the past, and you and I have the same memory that there was always a limitation on how much of the overall area could be covered with "spots". The EPA definition of a spot is quite clear - "no individual spot may exceed 2 square feet". However, with this new pyrethroid labeling I spent quite awhile trying to find out if there was any more to this, and apparently there is not. The dimension of that "spot" are not defined, so I suppose it could be a spot 1 foot wide by 2 feet long, or 6 inches wi... Read more

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Please note, Mr. Pest Control is answering questions supplied by PMP customers across North America. His answers are generated from industry and manufacturer-provided information. The answer may not be specific to the laws and regulations for your State, Province, Territory or Country. In addition, products mentioned may not be registered and or available in all areas. Always check with your local Univar office for specific information to your area. Always read and follow label directions.

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