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Soft or Spongy Decay 

Armillaria cepistipes
(Armillaria Root Disease )

Armillaria gallica
(Armillaria Root Disease)

Armillaria nabsnona
(Armillaria Root Disease)

Armillaria ostoyae
(Armillaria Root Disease)

Armillaria sinapina
(Armillaria Root Disease)

Fomes fomentarius
(White Spongy Trunk Rot )

Ganoderma applanatum
(White Mottled Rot )

Heterobasidion annosum
(Annosus Root and Butt Rot )

Inonotus obliquus
(Sterile Conk Trunk Rot of Birch)

Perenniporia subacida
(Stringy Butt Rot)

Phellinus igniarius
(Hardwood Trunk Rot )

Phellinus tremulae
(Aspen Trunk Rot )

Trichaptum abietinum
(Pitted Sap Rot )

Veluticeps fimbriata
(Brown Cubical Pocket Rot)