Eprinex is the only insecticide labeled for cattle grub control on lactating dairy cattle.
The following insecticides can be used to control cattle grubs on dry cows, replacement heifers and bulls.
If you treat dry pregnant cows be sure to observe and follow all waiting periods. If a treated cow should come
fresh before the waiting period is up, it will be necessary to discard her milk until the required time has passed.
Whenever the below-listed systemic insecticides are used as pour-ons or as a spot-on, the weights of the cattle
must be estimated or measured to accurately determine the amount of insecticide to be used on the animal
being treated. DO NOT use more insecticide than is recommended on the label. READ THE LABEL COMPLETELY
BEFORE USING ANY INSECTICIDE. DO NOT use systemic insecticides in conjunction with organophosphate
wormers such as Baymix (coumaphos) or Loxon (haloxon).
| Pour-ons - Insecticide | Amount/100 lbs body wt | Days to freshening |
| Co-Ral 4% OS | ½ fl oz Ready-to-Use | 14 Do not exceed 4 oz/animal |
| Eprinex (eprinomectin) | 1 ml / 22 lbs | 0 - can be used on lactating animals |
| Neguvon 8% OS | ½ fl oz Ready-to-Use | 7 Do not exceed 4 oz/animal |
| Tiguvon 3% OS | ½ fl oz Ready-to-Use | 28 |
| Warbex 13.2% OS | ½ fl oz Ready-to-Use | 21 Do not exceed 4 oz/animal |
| Spot-ons - Spotton 20% OS | See Label | Do not treat breeding age cows |
| Sprays - Co-Ral 25% WP or 11.6% EC | 12-16 lb or 3 gal/100 gal water | Do not treat dry pregnant cows within 14 days of freshening. |
Co-Ral Spray: Apply spray to animals using a high-pressure sprayer in order to soak the skin as well as the hair.