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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.