Once it enters the shoots, it will work its way down the branch on all susceptible varities. If the branch is not amputated quickly within hours or days, it will enter the trunk, killing the tree. In this case, Citron de carmes is the pear. I’m not concerned i will grab follow-up photos. The tree is on a resistant rootstock grafted over 3 feet from the ground so i can easily be back in fruit in 2 years with a resistant variety like harrow delight. I have hundreds of pears so an experimental tree being hit with blight is to be expected. If not prepared, this can be devastating to the home orchardist. In this case, there is no doubt the tree will die it has hundreds of strikes in the last day. I will experiment on it later with a 50/50 white vinegar solution. The leaves will turn half black, and the tree will look bad. Have saved 5 full trees in this way, but more testing is needed. Usually it never gets so far as to infect an entire tree. Vinegar is a herbicide and an antibacterial. The question everyone would ask is if it works, why wouldn’t everyone do it. Does it really work is the question? It has for me but i will test it again. Pear tree Fireblight research so you dont have to
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