I have used Surround WP for several years but I stopped using it on
peaches. My pest problems were not too bad and the surround is almost
impossible to wash off the fuzz. Surround does stop apple maggot, plum
curculio and many other pests but you must apply it after a hard rain
and keep a good coating from June drop on, i.e. a lot of work.
I order Surround from Fedco, for my small 8 tree orchard, the 25# bag
will last me 2 years. Seems the Gardens Alive is the same version only
with more expensive packaging. Surround is trademarked so there is
really only one place that makes it. It is kaolin clay spun in a high
speed centrifuge so that only very fine particles remain.