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

John A. Hoes, primary collator (last update 3/10/93)


FUNGAL DISEASES

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.

MISCELLANEOUS DISEASES OR DISORDERS

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

VIRUS DISEASES

(Also mycoplasmalike organism [MLO])
Aster yellows
MLO
Crinkle
Oat blue dwarf virus