Canning is a step during the curing process, after you have dried the bud upside down clip the bud from it's letover branch, then put it in a can and store it in a cool dry place for 5-8 weeks (8 weeks is the pinacle and has the best smoke). The canning parocess also sweats the bud so you can control how dry or moist your bud is by changing the intervals at which you open the can and give it fresh air. the damper the bud the slower it'll burn (it's damp not wet). If your buds are too dry don't mist them just add new buds in the same can.
oh and I found a why to kill off those buggs. before you dry the buds microwave um for 15 SECONDS OR LESS NO MORE. This wont remove them but they wont hatch while you smoke them.
Personally I put mango or grapefruit slices in the can with my sativa buds for a super fruity smoke.