Yeah, when cutting down trees gets old, you need a better solution to keep away bees. As you know bees are attracted to nectar, and the more of it, the better for them. So you should remove traces of nectar that appear around the property. Find this sweet, liquid-like substance in flowers and some trees, and try to remove most, if not all, of these plants. Think of nectar as the sugar that people like to consume. Unless you plan to make honey any time soon, you cannot keep nectar anywhere on your property.