I would like to confirm once and for all how much to prune below fireblight infection. I see 8 to 12 inches, at least 9 inches, etc. I think it's really supposed to be 12 inches and no less.
Certified GKH Gardening Expert
Yes, most resources do specify cutting back branches 8-12 inches from the canker margin, or affected area. However, I recommend 12 inches, as the canker margins are not always well defined and at least this way, you're more likely to get all of the infected area. Always better to be on the safe side.