Monterey B.T. Insecticide

My beautiful garden came under attack by moth caterpillars. Overnight it seemed half a shrub would be gone. I was told by some gardener friends that B.T is organic garden friendly and will take care of the problem. So I purchased this from Amazon, the bottle that connects to your hose. After I picked off all the caterpillars I could find, I used this product and my shrubs are growing back, and I guess it helps that I had to prune many of the leaves and branches, because they are fuller and thriving.