Scleroderris canker (American name), or Brunchorstia disease (European name), Gremmeniella abietina, is a species of fungal diseases infecting coniferous forests.

In the forest industry, fighting off an infection of Scleroderris canker is usually not cost-effective.

Gremmeniella abietina is a plant pathogen that causes scleroderris canker.

Jack pines are also susceptible to Scleroderris canker (Gremmeniella abietina).

A severe Scleroderris canker infection can sometimes be disastrous, as the fungus survives on the pine cones, killing any new seedlings within two years.

Early signs of a Scleroderris canker infection includes a purple tint in the needles and, more evidently, the falling off the needles in the wrong season.

Scleroderris canker (American name), or Brunchorstia disease (European name), Gremmeniella abietina, is a species of fungal diseases infecting coniferous forests.

Chemical analysis has shown that Polytolypa hystricis contains a unique triterpenoid chemical named polytolypin, as well two compounds known previously as metabolites from Scleroderris Canker (Gremmeniella abietina).