I have a bearing age fruit tree nursery on my property with trees that have lots of branches below the browse line. I make a mixture of Ivory soap, 1 bar grated and then put through the blender with a couple cups of water and a dozen eggs also blended with a couple cups of water. I spray the trees about once a month using about 2 eggs worth of mixture to a gallon of water. It has worked adequately for years although during peak growth I sometimes have to tighten the sched. I see deer next to the trees frequently, browsing other vegetation.