Dairy Cattle Pests

Jenifer Cruickshank
March 2020

In all cases, follow the instructions on the pesticide label. The PNW Insect Management Handbook has no legal status, whereas the pesticide label is a legal document. Read the product label before making any pesticide applications.

Note: Products are listed in alphabetical order and not in order of preference or superiority of pest control.


  1. Materials suggested for use on dairy animals may also be used on beef animals.
  2. Materials listed below are approved for use in all dairy cattle, including lactating animals, unless otherwise noted.
  3. Some of the products suggested for insect control are registered as drugs, not insecticides, and are regulated by the FDA.
  4. When using backrubbers or dust bags to dispense product, place the backrubber or bag where cattle will congregate or pass through regularly, such as the exit alley from the milking parlor. For backrubbers, be sure to recharge/resaturate as needed.
  5. After use of a spray or pour-on, wash teats thoroughly before milking.
  6. For many ear tags, “optimum” control is provided by two tags per animal; “adequate” control is provided by one tag per animal.