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Open Access Publications from the University of California

Evaluation of Irrigation Valve Boxes as Underground Bait Stations for California Ground Squirrel Control

  • Author(s): Ellis, Tracy
  • Salmon, Terrell P.
  • Wilen, Cheryl
  • et al.

The anticoagulants chlorophacinone and diphacinone are registered in California to control ground squirrels. Since multiple feedings on these anticoagulants are necessary, bait stations are often used. Several bait station designs have been suggested and used to reduce tampering and also to minimize bait exposure to non-target animals. Potential options to reduced exposure risk strategies are to use a modified-T bait station, underground bait station, or in-burrow baiting. This study evaluated the behavior of ground squirrels with regard to modified-T and underground bait station compared to the standard-T bait station that is commonly used for ground squirrel control.

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