About TERRO A trusted brand for over 90 years, TERRO is the industry leader in ant control. Based in Lititz, PA, TERRO offers proven ant control products including liquid ant baits, aerosol sprays, and perimeter granules. Their mission: To help homeowners get rid of ants, spiders, mosquitoes, fruit flies, pantry moths, and other annoying pests. Fast-acting elimination of queen ant and the entire colony. Convenient and easy-to-use ant killer liquid drops. Kills Argentine ants, ghost ants, cornfield ants, and more. Designed to kill the worker ants in 2 to 3 days. Made in the USA.