Needles cast

Colletotrichum acutatum
( Colletotrichum blight )

Colletotrichum gloeosporioides
( Colletotrichum blight )

Fusarium oxysporum
( Fusarium top blight )

Melampsora medusae
( Melampsora foliage rust - conifer-aspen rust )

Melampsora occidentalis
( Melampsora foliage rust - conifer-cottonwood rust )

Meria laricis
( Larch needle cast )

Phoma spp.
( Phoma blight )

Phomopsis spp.
( Phomopsis canker and foliage blight )