Laws And Labels

Thursday December 9, 2010


Mr Pest Control


Is there a governmental web site or publication that states the rules for rodenticide use in Wisconsin? For example: Do residential rodent bait stations have to be tamper proof, include an information date card inside the station, maximum amount of rodenticide in a station, or station placement, monitoring intervals, and labeling.

Mr Pest Control


Good morning Lance. I am going through the pesticide use regulations for the State of Wisconsin, which you can find at , in Section ATCP 29.50 (go down to about page 22). On PestWeb we do have links to every state regulatory agency, and you can find these in the Industry Information / Associations and Government resource, where you can select your state and then click on the appropriate link. Of course, sometimes it's confusing filtering through these websites, but I found the text of your regulations in the "Rules and Statutes" link on the right side of their home page.

One of the first things that comes to mind for Wisconsin, as it is for California, is that there is a Pre-Notification requirement that you may already be aware of. You are required, PRIOR TO a pesticide application at any residence, to offer in writing any information requested on the pesticides you plan to use. You can find the details on this on Page 22 in the regulations - ATCP 29.55 Item 3. While we are making this answer specific to your state, anyone else can find the link to their own regulatory agency on PestWeb, and within that website find a link to the pesticide use regulations. It is REALLY important to read these things - ignorance of the law really is not bliss.

Other than this though, I could not find anything specific to rodent control or rodenticides, which leads me to believe that Wisconsin, as do nearly all states, only require that you comply with EPA regulations and the product labels. There are some changes coming along in 2011 that you will notice, and these are to comply with the recent EPA "Risk Mitigation" decisions. One change is that rodenticides used outdoors must be used within 50 feet of a building if used above ground. Another change will be the package sizes that can be "delivered" to you, and package sizes that can be sold in retail stores. The EPA wants to limit the amount of rodenticide sold to homeowners, so as of June 2011 there will be no more sales of "second generation" anticoagulants (brodifacoum, bromadiolone, difenacoum, difethialone) to homeowners, and no package size larger than 1 lb of bait. For professionals the minimum package sizes we can sell will be 4 lbs for 1st Generation anticoagulants (warfarin, diphacinone, chlorophacinone) and 16 lbs for 2nd Generation anticoagulants. Just be prepared for this change when you purchase rodenticides from Univar. You can find details on this new Risk Mitigation on Bell Labs' website.

If the labels do not already require this, above ground use of rodenticides pretty much will have to be within Tamper Resistant stations, which is always a good idea anyhow. The new regulation will read "IF the bait is exposed to children or non-target animals" it must be within a tamper resistant station, and using baits outdoors nearly always "could" place them where some non-target animal could access them. The higher cost of TR stations is offset by limiting your liability if someone's dog eats available bait. In general, rodent stations should include the basic information of WHAT bait product is in the station and WHO is responsible for that station (company name and phone number), and this should be on the outside of the station. If a dog or child gets to the bait this information then is readily available to provide to emergency medical people who may need to treat the animal or child.

The amount of bait to use in a station also may be dictated by each product label. For example, to pick one product, the Contrac All Weather Blox label states that for mice you use "1 block per placement" and for rats "3-16 blocks per placement". Since the Label Is The Law, you are required to comply with the guidelines written on it, and your state appears to enforce the label without further modifications. Station placement intervals also are stated on the Label. How often you check the station is not as clearly stated on rodenticide labels. However, nearly all rodenticide labels will mandate that you quickly remove and dispose of any rodent you find that is "dead or exposed to the bait", as well as bait remaining once rodent activity ceases. Since a rodent could be affected by anti-coagulants in as little as just a day or two, this suggests you should be back to that site within just a couple of days. Placing stations and leaving them unmonitored for weeks at a time could be a problem if dead rodents end up laying around where predators or pets could find and eat them.

So, I suggest you go to your state's pesticide use regulations and read them carefully (maybe even print out the appropriate pages and keep them with you), and also carefully read the entire label for any rodent or insect control product you use. The fine print is important information, and sometimes we are surprised by the wording on a particular product label. For rodent control be aware of the impending new regulations, but otherwise just follow the Product Label instructions.

Mr. Pest Control

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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.