My wife gave me 6 Eldarica pine trees for Christmas. Noticed a couple of them were getting chewed on, so I suspected deer and soaked them with deer repellent and wrapped them with chicken wire. Two weeks later half of them were completely naked, stripped bare of needles. And covered with harvester (red) ants. I have tried the usual remedies such as diazinon, dersban, etc. Nothing seems to work on them except being sprayed with Raid. But there is a HUGE colony of these ants nearby and they seem to thrive on the typical granular poisons. Any suggestions?