Thinning a Prune Tree
In Mr. Burbank's orchards the superabundant fruit on the prune tree is shaken off by lightly tapping the branches with a piece of rubber hose attached to the end of a fish pole. This treatment does not injure the tree, and is particularly valuable for first thinning. It may be desirable subsequently to thin further by hand.
This image is from: Luther Burbank: his methods and discoveries and their practical application. Volume 5 Chapter 3