Holy crap... I'm gonna definitely keep an eye out for those bastards. Have you tried Carbaryl? I used the shit like water when working for the USDA, and it is the go to tool if you need bugs to f'ing die and keep doing doing do for a two years after it is applied. Mind you, I have been a fucking mess ever since being around so much of that crap, but it works.
Here is Carbaryl in civilian friendly portions.
We would get the shit delivered in 55 gallon drums 100 of them a summer. We would put 1 55 gallon barrel in 1000 gallons of water, and you could literally watch the caterpillars fall out of the trees, gnats, bee's, wasps. It would all die instantly.... June beetles would crawl around for about 30 seconds then their shells would make cracking noises.
Little piece of info it is made by the Bayer Aspirin corporation, it's the white crap by the stem of your apples in most cases, and "If your system becomes overloaded with Carbaryl you cant even eat an apple with the skin on it you will be so sensitive to it." In thus I grow 80% of the vegetables I eat for the year, and 40% of the fruit." The USDA does not recognize it at a health condition, so they don't owe me a cent. If I eat anything with that shit on it I vomit within 30 min every time. permethrin isn't much better for you.
Edit: I should be better within 5 years if I avoid it like the plague.