"The Tamarix was introduced to the United States as an ornamental shrub, a windbreak, and a shade tree in the early 1800s. In the 1930s, during The Great Depression, tree-planting was used as a tool to fight soil erosion on the Great Plains, and the trees were planted by the millions."
Tamarix - Wikipedia, the free encyclopedia
So basically we're introducing millions of Chinese beetles to kill a tree that was intentionally planted to prevent erosion in the 1930s. What will we do to stop the erosion when the tamarisk are gone? There has to be another non-native plant that can fill the void and be immune to the ravages of the awful Chinese beetle.