You raise good points for not using chemical treatments, or at least some of them. But what happens if there is a chemical reaction between two different treatments? Granted this may or may not be the case, but there is always a possibilty that it "could" happen, (not saying it will). It would seem if checkmite is the latest treatment, and it's not a good thing to use, that chemical treatments are just plain not working, and we need to as an industry, move past these invasive treatments to something more natural. Any ideas???
"I reject your reality, and substitute my own." Adam Savage