Behl from Corona writes,
How long is expiration date on 1 gal
If I buy 1 gal bait, does it has expiration date?
Terro PCO Liquid Ant Bait does not have an expiration date because the effectiveness of the active ingredient does not diminish over time. However, like any food-based product, the bait may become less appetizing to foraging ants after an extended shelf life. We recommend using fresh bait if you've had the same liquid bait for more than two years.
Answer last updated on: 10/28/2014