I tried many products. Amdro is the best. And it doesn't take a lot. Spread some around the mound and a just light sprinkle on top. The forager class of the colony leaves the mound searching for food and don't expect to find it on the mound. And no need to disturb the mound, that brings out the soldiers who ignore the food. The foragers also feed the queen first making her the first to die.