Cambistat and Shrubs
Shrubs are not yet fully developed for Cambistat, however they will be by 2008. The issue you are seeing is someone guessed at the rate and used too much. The shrub is probably very dark green and the leaves are smaller, its health is fine.
Small trees are often treated to increase their root growth so they recover from transplant shock.
The best use for Cambistat is reducing the growth rate and increasing the root growth for larger trees growing on smaller sites. It also has many other uses as well. It is important to understand the product and the dosing criteria. If used properly, it is a a good tool that can help trees in certain situations.