My understanding is beetles lay eggs on the plant, after the tobacco is rolled if allowed to reach temps above 71 degrees, allows the eggs to hatch and begin the eating process, and eventually laying more eggs and more destruction. vacuum sealing is one way to destroy the eggs before they hatch. Another way to revent is to maintain temps below 70 degrees, thus the winador comes in. I keep my house at 70 degrees, thus my cooler stay at 70-71 with rh of 67%. Hopefully preventing growth of eggs.
This comes from "The Idiots guide to Cigars".