sentences:  Amber colored resin profusely exudes from the edges of cankers, runs down the bark, or drips onto lower branches or the ground, and then hardens into a white crust.The lesions associated with this pathogen typically go visibly unnoticed on infected host trees for several years, due to the diseased tissue being held in place by resin.The formation of callus at canker margins is subtle or nearly absent, usually resin is the only indication of an underlying bark lesion.