Diseases of Flax
(Linum usitatissimum L. and other Linum spp.)

Anthracnose: Colletotrichum lini (Westerdijk) Tochinai
Basal stem blight: Phoma spp.; P. exigua Desmaz. var. linicola (Naumov & Vass.) Maas
Brown stem blight: Alternaria linicola Groves & Skolko
Browning (and) stem break: Aureobasidium lini (Lafferty) Hermanides-Nijhof; (teleomorph: Guignardia fulvida F.R. Sanderson)
Damping-off, root rot, and seedling blight: Alternaria spp.; Colletotrichum lini (Westerdijk) Tochinai; Fusarium spp.; Pythium spp.; Rhizoctonia solani Kühn; (teleomorph: Thanatephorus cucumeris (A.B. Frank) Donk); Thielaviopsis basicola (Berk. & Broome) Ferraris; (synanamorph: Chalara elegans Nag Raj & Kendrick)
Dieback: Selenophoma linicola Vanterpool
Pasmo: Septoria linicola (Speg.) Garassini; (teleomorph: Mycosphaerella linicola Naumov)
Rust: Melampsora lini (Ehrenb.) Desmaz.
Stem mold & rot: Sclerotinia sclerotiorum (Lib.) deBary
Wilt: Fusarium oxysporum Schlechtend.:Fr. f. sp. lini (Bolley) W.C. Snyder & H.N. Hans.

Boll blight: Extreme high temperatures
Chlorosis: Alkaline and very wet soils; mineral deficiencies; herbicide damage
Stem girdle: Extreme high or low temperatures cause cankers at soil level
Stem twisting and bending: Herbicide damage and soil and temperature conditions

(Also mycoplasmalike organism [MLO])