Question
Who makes a decent sprayer to apply the copper solution? Brand, model etc.

Answer
Usually copper sulfate is recommended to be applied by a professional. The reason the copper sulfate is usually recommended to be applied by a professional is they would have the equipment to spray the solution up into large trees most homeowners would not. The moss can be picked off the tree--again if the tree is large it will take a bucket truck to get up into the foliage and these usually are for professionals but can be rented. If the trees are smaller then the homeowner can easily remove or spray the solution. Solo makes good sprayers that are hand held and can reach out about 15+ feet. To get a spray mixture up higher that that you will need a power sprayer. When spraying up into a tree the drift back down will get on you and the cooper can stain. I would try pulling the moss off before spraying and if sprayed on large trees I would get a professional. Here is a site that has the Solo type sprayers--handheld and power. http://www.solousa.com/store/browse/handheld_sprayers.html


Here is a web link to the use of the cooper mixture.   http://www.ipm.ucdavis.edu/PMG/PESTNOTES/pn7481.html