Re: Bleach for combless frame sterilization/disinfection; opinions wanted
Not quite right there, bleach is very effective, it quickly breaks down AFB spores. But as others have pointed out, cleaning may be the issue. If the AFB spore is in some wax or somehow otherwise protected so the bleach won't get to it, won't work. But if you can get bleach in contact with AFB spores it will work.
Bleach is not very effective at all, other chemical disinfectants are effective only at very high concentrations.
I actually did an experiment to confirm this in my mind. I caught a swarm that went into a wooden nuc. Checked it maybe a month later, lousy with AFB to the point the whole ting even smelled bad. The bees and frames were burned, but I decided to try bleach on the box. The box cleaned best I could, and then thouroughly washed in bleach. After drying, a new sacrificial nuc was put in. No AFB sowed up and the nuc is now a hive. I've used the nuc quite a lot, no AFB,
44 years, been commercial, outfits up to 4000 hives, now 120 hives and 200 nucs as a hobby, selling bees. T (mostly).