Root system is deformed

Cylindrocarpon destructans
( Cylindrocarpon root rot )

Fusarium spp.
( Fusarium root rot )

Phytophthora spp.
( Phytophthora root rot )

Pythium spp.
( Pythium root rot )

Pythium spp.
( Needle dieback )

Xiphinema bakeri
( Corky root disease )