I've fought Colorado Potato Beetles for years with several other products, but nothing worked better than "fair". I was skeptical this would work, and waited a few days to long to order. I had already hand picked hundreds of adult beetles and plucked countless leaves with eggs but was fighting a losing battle. My order was shipped right away, and I applied the afternoon I received it. 2 ounces in 1 gallon of water, and applied with a very fine spray covering both sides of the 200' row. I had many potato plants with no leaves left, and some where the main stems were eaten half way to the ground. Most plants had dozens of larvae, and there were hundreds of larvae per plant on some of the 200' row. I checked it first thing the next morning after spraying, and there were a few dead bugs on the ground. It appeared some were still actively eating the leaves, but not many. The next day I checked again, not expecting great results. I was shocked to see 99.9% of the bugs were dead on the ground. I checked daily after that and fond zero bugs. Now, 1 week after that first spray, I found 2 adult beetles and 3 larvae on the whole row. The stripped plants have already recovered with many new leaves and the whole row looks very healthy. I plan to spray again in the next day to keep them under control. This is a great product.