MAX40 Insecticide Cattle Ear Tags

Sustained-release insecticide ear tags designed for use on beef and non-lactating dairy cattle, including calves over 3 months of age. The tags are formulated to control horn flies, including pyrethroid-resistant populations, as well as Gulf Coast ticks and spinose ear ticks, while aiding in the control of face flies, lice, stable flies and house flies.

Contains a highly concentrated 40% Diazinon insecticide load within the tag matrix. This controlled-release technology regulates how the active ingredient is distributed across the animal’s hair coat over time, supporting continuous insect control throughout the treatment period. The sustained-release design extends the effectiveness of the tag while maintaining consistent insecticide exposure. 

MAX40 tags have been proven effective against pyrethroid-resistant horn flies for up to approximately five months when used as directed. This extended control helps reduce the need for frequent retreatment and supports season-long fly management with fewer handling events. 

The tags are designed for use within insecticide rotation programs to help support long-term resistance management strategies. As an organophosphate-based ear tag, MAX40 provides an alternative mode of action compared to pyrethroid fly tags, making it a valuable rotational option in operations experiencing fly resistance challenges.

With a Snap-Lok collar design, it helps support tag retention throughout the treatment period. By reducing fly pressure and parasite irritation, the tags help improve cattle comfort and support normal grazing and feeding behavior during peak fly season.