I have 2 young lemon trees, about 4 feet tall, and recently its developed a brown scaby/blistery looking thing over some of its branches, and ants are crawling on it more than they were when i first planted them, but they dont crawl on the diseased branches...what is on my tree and how do i take care of it?
Do the scab things come off if they are picked off? I would look into scale insect. They secrete a sticky substance that attracts ants, so its a possibility.