Tuesday, January 31, 2012

New Pyrethroid Label Requirements (for Non-Agricultural Outdoor Pyrethroid Products)

In an effort to reduce the potential for runoff and drift that can result from applications of pyrethroids, the EPA has revised the “Environmental Hazard Statements” and general “Directions for Use” sections for pyrethroid non-agricultural outdoor products. Pyrethroids include pesticide products such as “Talstar” (bifrenthin), “Tempo” (cyfluthrin), “Suspend” (deltamethrin), and others. The EPA revisions also apply to “combination products” such as: “Temprid SC,”  and “Transport WDG and “Transport ME.” The new requirements also apply to consumer end pyrethroid-containing pesticides, such as “Ortho Home Defense Max” (bifenthrin), Bayer Advance Home Pest Control (cyfluthrin), and others.

The new environmental hazard statements are specific for different formulations (i.e., liquid, dust, granular, and ready-to-use products). The general “Directions for Use” included in this labeling initiative are considered to be best management and good stewardship practices.

Let's take a look at some of the new changes:
  • Requirements for Granular Formulations labeled or intended for outdoor residential uses: 
o   “Apply this product directly to the lawn or garden area. Water treated area as directed on this label. Do not water to the point of run-off.”
o   “Do not make applications during rain.”
  • Requirements for Liquid, Dust, and Ready-to-Use Formulations products labeled or intended for outdoor residential uses:

o   “Do not water the treated area to the point of run-off.”
o   “Do not make applications during rain.”
  • Additional Application Restrictions For General Outdoor Surface and Space Sprays, except for outdoor fogging devices:
o   “All outdoor applications must be limited to spot or crack-and-crevice treatments only, except for the following permitted uses: 

(1) Treatment to soil or vegetation around structures;
(2) Applications to lawns, turf, and other vegetation;
(3) Applications to building foundations, up to a maximum height of 3 ft.

Other than applications to building foundations, all outdoor applications to impervious surfaces such as sidewalks, driveways, patios, porches and structural surfaces (such as windows, doors, and eaves) are limited to spot and crack-and-crevice applications only.”

Although the label changes do not apply to turf (such as athletic fields), these new label changes will affect the way you conduct pest management using pyrethroids. The one restriction that will probably impact your usual pest management techniques the most is the limitation of structural sprays to impervious surfaces. If you need to do a perimeter treatment, you are still allowed to apply the product up the foundation wall (to a maximum height of 3 feet) and on the soil and vegetation around the building. The major change applies to outdoor applications to impervious surfaces like sidewalks, driveways, windows, doors, and eaves. For example, in an area where a driveway meets a garage door (such as at an athletic or maintenance facility), you are limited to either a spot treatment (an area no larger than 2 square feet) or a crack-and-crevice treatment in that area because both areas (the garage door and the driveway) are considered impervious surfaces. 

Most likely, if you're applying an exterior perimeter spray, you're dealing with a pest like ants, millipedes, ladybird beetles, or another equally persistent pest. In those cases, a crack-and-crevice application to those impervious structural surfaces like garage doors, windows, eaves, etc., will provide the most benefit anyway, as those areas are often points of entry for these pests. So, here's the good news: if you follow the new label requirements, you'll be using the product in a more efficient manner and the potential for runoff will be reduced. A win-win situation! 

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