Diseases of Cotton
(Gossypium spp.)

Stuart D. Lyda and G. M. Watkins, primary collators; updated by P. D. Colyer, T. Kirkpatrick, and C. Rothrock (last update 7/9/01)

BACTERIAL DISEASES

Bacterial blight

Xanthomonas campestris pv. malvacearum (Smith 1901)
Dye 1978b

Crown gall

Agrobacterium tumefaciens (Smith and Townsend 1907)
Conn 1942

Lint degradation

Erwinia herbicola (Lohnis 1911) Dye 1964

= Pantoea agglomerans (Ewing and Fife 1972) Gavini et al.
    1989

FUNGAL DISEASES

Anthracnose

Glomerella gossypii Edgerton

    Colletotrichum gossypii Southworth [anamorph]

Areolate mildew

Ramularia gossypii (Speg.) Cif.

= Cercosporella gossypii Speg.

    Mycosphaerella areola J. Ehrlich & F.A. Wolf
    [teleomorph]

Ascochyta blight

Ascochyta gossypii Woronichin

Black root rot

Thielaviopsis basicola (Berk. & Broome) Ferraris

    Chalara elegans Nag Raj & Kendrick [synanamorph]

Boll rot

Ascochyta gossypii Woronichin

Colletotrichum gossypii Southworth

    Glomerella gossypii Edgerton [teleomorph]

Fusarium spp.

Lasiodiplodia theobromae (Pat.) Griffon & Maubl.

= Diplodia gossypina (Cooke)

    Botryosphaeria rhodina (Cooke) Arx [teleomorph]

= Physalospora rhodina Cooke

Phytophthora spp.

Rhizoctonia solani Kühn

Charcoal rot

Macrophomina phaseolina (Tassi) Goidanich

Escobilla*

Colletotrichum gossypii Southworth

    Glomerella gossypii Edgerton [teleomorph]

Fusarium wilt

Fusarium oxysporum Schlechtend.:Fr. f. sp. vasinfectum (Atk.) W.C. Snyder & H.N. Hans.

Leaf spot

Alternaria macrospora A. Zimmerm.

A. alternata (FR.:FR.) Keissl.

Cercospora gossypina Cooke

    Mycosphaerella gossypina (Atk.) Earle [teleomorph]

Cochliobolus spicifer R.R. Nelson

    Bipolaris spicifera (Bainier) Subramanian [anamorph]

= Curvularia spicifera (Bainier) Boedijn

Myrothecium roridum Tode:Fr

Rhizoctonia solani Kühn

Stemphylium solani G. F. Weber

Lint contamination

Aspergillus flavus Link:Fr.

Nematospora spp.

Nigrospora oryzae (Berk. & Broome) Petch

Phymatotrichum root rot = cotton root rot

Phymatotrichopsis omnivora (Duggar) Hennebert

= Phymatotrichum omnivorum Duggar

Powdery mildew*

Leveillula taurica (Lev) G. Arnaud

    Oidiopsis sicula Scalia [anamorph]

= Oidiopsis gossypii (Wakef.) Raychaudhuri

Salmonia malachrae (Seaver) Blumer & E. Muller

Rust

    Cotton rust

Puccinia schedonnardi Kellerm. & Swingle

    Southwestern cotton rust

Puccinia cacabata Arth. & Holw. in Arth.

    Tropical cotton rust*

Phakopsora gossypii (Lagerh.) Hiratsuka

Sclerotium stem and root rot = southern blight

Sclerotium rolfsii Sacc.

    Athelia rolfsii (Curzi) Tu & Kimbrough [teleomorph]

Seedling disease complex

Colletotrichum gossypii Southworth

Fusarium spp.

Pythium spp.

Rhizoctonia solani Kühn

    Thanatephorus cucumeris (A.B. Frank) Donk
    [teleomorph]

Thielaviopsis basicola (Berk. & Broome) Ferraris

    Chalara elegans Nag Raj & Kendrick [synanamorph]

Stem canker

Phoma exigua Desmaz.

Verticillium wilt

Verticillium dahliae Kleb.

NEMATODES, PARASITIC

Lance, Columbia nematode

Hoplolaimus columbus Sher

Reniform nematode

Rotylenchulus reniformis Linford & Oliveira

Root-knot nematode

Meloidogyne incognita (Kofoid & White) Chitwood

Sting nematode

Belonolaimus longicaudatus Rau

VIRAL DISEASES

(Also uncharacterized graft transmissible pathogens [GTP])

Abutilon mosaic = Malvaceous chlorosis virus*

suspect Begomovirus (Bemisia tabaci transmitted)

Anthocyanosis*

suspect virus

Blue disease*

suspect virus or phytoplasma

Leaf crumple

genus Bigeminivirus, Cotton leaf curl virus (CLCuV)

Leaf curl*

genus Bigeminivirus, Cotton leaf curl virus (CLCuV)

Leaf mottle*

suspect virus (etiology unknown)

Leaf roll*

suspect virus (etiology unknown)

Mosaic*

suspect virus (etiology unknown)

Psylosis*

suspect virus (etiology unknown)

Terminal stunt

suspect virus (GTP; Cicadellidae associated)

PHYTOPLASMAL and SPIROPLASMAL DISEASES

Phyllody*

suspect phytoplasma

Small leaf

suspect phytoplasma

*Not known to occur naturally in the United States of America.