Hi everyone, I'm Frinda writing from Kentucky. I'm a long time organic gardener. I have a potted lime tree overwintering in my greenhouse. For the past couple of years, I've had sugar ants in it; really, they're pretty good farmers. They bring scale (their "cows") into the tree, wait for the scale to suck juices from the tree and then they eat the honeydew. I admit I admire their industry, but I'm getting tired of it. Twice a week, I have to examine each leaf and branch and kill the "cows". But this year, the ants are super industrious. They are back at it in mass every day, and I'm ready to send them to organic heaven. I've tried sprinkling diatomaceous earth to no avail. I've powdered the earth with boracic acid but they aren't interested. Tried a Pyrethrum spray; nothing phases them. So now I'm thinking of trying a neem oil spray and see how that goes. Maybe a summer oil spray? But then I'd have to wait for reliably warm weather; it'd be too messy in the green house. Any suggestions?