“This is an excellent product. We have used it before in the garden where ants infest the fruit trees and encourage and feed the aphids. You don't need 1 per tree, just 1 per nest if you can locate the nest. They seem to last months and don't affect the ecosystem as much as powder, for example, as they are a self-contained unit. (We would be very worried to use that loose powder in case it got into the food chain) These bait stations are a safer alternative.”