Abamectin

Abamectin — Fire Ant Baits, Mite Control & Turf Applications

Avermectin (Macrocyclic Lactone) · CAS 71751-41-2

Abamectin is derived from the soil bacterium Streptomyces avermitilis. Despite its natural origin, it's highly effective at very low concentrations — the active ingredient in fire ant bait, Avid miticide, and some fire ant and mite control products.

Mode of Action Activates glutamate-gated chloride channels in invertebrate nerve and muscle cells — causes paralysis and death; different binding site from pyrethroids

📋 Key Facts

Class

Avermectin / Macrocyclic Lactone

Signal Word

Warning

Origin

Fermentation product of Streptomyces avermitilis

Key Uses

Fire ants, mites, leafminers, turf pests

Residual

Short outdoor residual (UV/soil degradation); longer in soil

Bee Toxicity

Moderate — low when dry

Key Products

Avid (mites), Varsity (fire ants), Clinch (fire ants)

🎯 Primary Uses

Abamectin is used for: fire ant mound treatment and broadcast bait (Varsity), spider mite and other mite control (Avid miticide — widely used in agriculture and interiorscapes), leafminer control in ornamentals, and some turf pest applications. At very low concentrations, it's extremely effective against mites.

🛡️ Safety Summary

Moderately toxic — more so than pyrethroids. Wear PPE during handling and application. Allow treated areas to dry before re-entry. Toxic to fish and aquatic invertebrates — avoid near water. Not for indoor broadcast application. At label application rates, residue on ornamentals is very low.

🔬 Resistance Status

Limited resistance documented in spider mites after heavy agricultural use. Resistance can develop with exclusive use — rotate with bifenazate or spiromesifen for mite programs. Fire ant populations show no significant resistance.

🏷️ Common Products

Avid 0.15EC (mites)Varsity Fire Ant BaitClinch Fire Ant BaitGreen Light Fire Ant Killer

❓ FAQ

Is abamectin the same as ivermectin?

They're closely related — both are avermectins derived from Streptomyces avermitilis. Ivermectin (used in veterinary and human medicine for parasites) is a semi-synthetic derivative of abamectin. They share the same mode of action but abamectin is for agricultural/pest control use.

Does abamectin kill fire ant queens?

Fire ant bait products containing abamectin (Varsity, Clinch) work by forager ants carrying the bait back to the colony and feeding it to the queen and other colony members — eventually killing the queen and collapsing the colony. Takes 1-4 weeks for colony elimination.