Some trees are more resistance than others. I have had it in my orchard on a number of trees, yet other trees were not affected. At times I have had fire blight so bad I could see the bacterial ooze dripping off the blossoms. But, as mentioned no infection on other trees. If I felt like I needed to do something, my first action would be to do just what you suggested. I have thought about trying to remove the canker tissue, but never have tried it. Canker blight that overwinter can cause water sprouts to become systemically infected by the fire blight bacteria if its on a nearby overwintering canker. If I cann't remove the whole branch because the canker is on the trunk, I just leave it alone. However, I do spray the trees with Kocide (copper) along wih my dormant oil spray and maybe it helps, but I am not sure it does much for the fire blight. There is a lot of information on fire blight and all of it does not agree. Studies have been done where it has not helped even to cut out the first strikes, just leave it alone until you do your dormant pruning and then cut out the dead branches. I used to put a lot of time and energy into fire blight, but now I take a more casual approach to it. I have had a lot worst looking trees than yours and one time ordered a new tree to take the place of the fire blighted one, just to pick a couple box of apples off of it this summer. I sprayed painted all the strikes with red paint, then pruned out all the branches during my late winter purning. The tree looked like Charlie Brown's Christmas tree, but is now doing well. Go ahead and try what you suggested. Unless you completely girdle the trunk, it should not harm the tree too much. Use it as a learning experience. See what works and what does not work. I have had some trees die from fire blight, replaced them and they again died. Now, I avoid that particular variety.

In a couple of days I will post a new topic about the use of liquid copper fungicide to prevent rot from entering large pruning cuts and large wounds to the trunks of trees. I have posted about this many times before and searching this site and scrolling through the topics that appear will turn up what I have said in the past. Of course if the tree already has a lit of dead wood--possibly large dead branches that may already provide entry points for rot, the benefits of any treatment may be limited. Anyway. I will post under a new topic with the appropriate search words in the title, what I know about the use of liquid copper fungicide as soon as I get the time. --Spruce

Try searching here http://edis.ifas.ufl.edu/TOPIC_Citrus_Pests_Diseases Here is a link that might be useful: Citrus Disease

Yes, any one can grow figs in ground in a zone 5, in the north. We have been able to grow them. We have been growing and testing for figs that can be grown in our zone 5b/6a location, for around ten years. We have in test plots or pots around 26 different figs, that are suppose to be cold hardy and or rare. After ten years of testing we found 3 figs that do very well in our zone 5b/6a Connecticut location, grown outside, in ground. In order to grow figs in a cold climate, you need more then just a fig that is cold hardy. You also need a fig that is rain resistant, when the fig is ripening. If not you will end up with all the ripening fruit exploding, just before they are ready to be picked A fig that is late winter/early spring, sun resistant. Your cold hardy fig might make it through the winter, only to be killed by late winter sun. A fig that will ripen early enough to beat your first frost. If it does not, you will end up with a lot of green figs, that never ripen. A fig that produces more then just a hand full of figs. That is if you want enough figs for fresh eating, fig wine, preserves, and so many you can share with your friends. A fig that is FMV resistant. Or at least a fig that can over come the disease if and when it is infected. If not the fig will never be cold hardy. A fig that can produce sweet figs even in cold northern soils. I can send to any one who request it, a list of northern climate, cold hardy figs we are testing, and the results of our testing. Along with the names of the only three figs that we recommend for main crop figs, for northern gardeners. We are still working on the best breba crop figs for the north. We have several that are showing a lot of promise. These three main crop figs, make growing figs in ground easy, and enjoyable in cold climates. We feel these three figs are more cold hardy then Hardy Chicago. If interested, send request for list to robertcharper@gmail.com Bob Harper zone 5b/6a - Conneticut