Rozol Ground Squirrel Bait Registered in Montana in 2016

Cecil Tharp, MSU Extension Pesticide Education Specialist


Previous surveys by Nistler et al. (2005) indicate a 24% average reduction in yield on ground squirrel infested forages. They cited Rozol as the most effective tool when managing ground squirrels. The anti-coagulant product, Rozol Ground Squirrel Oat Bait has been available for many years as a special registration, 24-C, for Montana producers.

In recent months producers have contacted the MSU pesticide education program regarding the availability of this product in 2016. This may have been due to the pursuit of Rozol Wheat Bait by Liphatech; raising the possibility of discontinuing the Rozol Oat Bait for management of ground squirrels. Liphatech and MDA have announced the renewed special registration of Rozol Ground Squirrel Oat Bait (EPA SLN No MT-00-0007) once again in 2016. Montana producers will once again have this tool when managing ground squirrels. Rozol Ground Squirrel Oat Bait is labeled for use on bare ground areas in non-crop areas, rangelands, pastures, alfalfa, wheat, oats, and barley.

Special Safety and Application Considerations

The anticoagulant, chlorophacinone, is toxic to fish, wildlife, humans, domestic animals and pets. This material may reduce the clotting ability of the blood and cause bleeding. Special care should be taken:

  • Keep humans, domestic animals and pets well away from the product material. Although applicators may elect to spot bait, bait stations should be considered to minimize contact with non-targets. Follow instructions on product label.
  • Applicators should wash thoroughly with soap and water after handling and before eating or smoking.
  • Do not apply on roads, near residential or public areas or over water.
  • Limit persistence of product by only using where oats will be ingested quickly. Do not apply bait unless tests with untreated oats are completely consumed by the target squirrels within two days.

To increase the effectiveness of this product applicators should attempt to time bait applications during a period of 3 to 4 days of little to no precipitation. Follow all baiting instructions on the pesticide product label including: pretreatment, spot baiting, bait stations and post-treatment instructions.

Further Information

Contact Michael Brownell at (414) 559-4436 or see the complete LIPHATECH news release (also attached to ag alert). When using this pesticide product applicators are required to follow and have in their possession the special registration, 24-C, label [link expired]. For safety related questions contact Cecil Tharp, MSU Pesticide Education Specialist at (406) 994-5067 or email [email protected]).


Johnson-Nistler, Knight, Jim, Cash, Dennis.
Agronomy Journal
Montana State University, Bozeman, MT.
September 2005 issue.

Original PDF (10K)

return to top