I'm in Alberta, zone 3. I have three problems that may have a common solution: Problem 1. Deer are eating my easter white cedar and many of my pines. Problem 2. Spruce and pine suffer from sun scald. Problem 3. Firs are suffering from a fungal needlecast. Would any of the following ideas work? A: To reduce sunscald, paint the trees white. Do this in late fall after chance of rain is small. If we get a warm snap, may need to reapply. The notion is to use something like white wash combined with a sticking agent, or possibly bordeaux's solution, or possibly white latex paint diluted with water, possibly with a wetting agent. The notion is that if the tree is lighter coloured, it won't warm up as much and needle moisture will be saved. B: To reduce deer snacking add potassium alum to the mix. This is both bitter and astringent and tastes terrible. To people. Any one know about the effect on deer? C: Bordeaux's solution is already a fungicide, and gets a mention for controlling needle cast on firs. but when to use it? There are a couple of commercial chemicals that are registered for use on firs, but reading the data sheets makes me reluctant to use them.