Hello, I just moved into a new apartment. There's a medium sized avocado tree on the property that growing out of a small plot surrounded by brick. I noticed yesterday, under one of the large severed branches, that there was a small pile of dust that instantly reminded me of termite droppings. Does anyone have experience in this? The tree has plenty of leaves, and is with a few that are brown at the ends. I've been watering once or twice a week, but I'd like to take steps to protect the tree from any future harm. Any advice or direction is greatly appreciated.