Botryosphaeria corticola has caused infection of oak trees in Spain,[2] Portugal,[3] Morocco,[4] Italy,[5] Greece,[6] Hungary,[7] and the United States.

[8][9][10] Bot canker of oak kills trees in natural forests as well as in cork plantations.

The cork industry in Portugal, Spain, France, Italy, and Morocco has been dealing with declining oaks for several years from biotic and abiotic factors.

[9] Botryosphaeria corticola infects the twigs, branches and stems of oaks and degrades the cambial tissues.

Pycnidia are dark brown to black, circular, immersed, partially erumpent and up to 1 mm diameter.