DisplayTitle

Diseases of Cucurbits
(Citrullus spp., Cucumis spp., Cucurbita spp., and others)

R. D. Martyn, M. E. Miller and B. D. Bruton, primary collators (last update 2/19/93)

BACTERIAL DISEASES

Angular leaf spot

Pseudomonas syringae pv. lachrymans (Smith and Bryan) Young et al.

Bacterial fruit blotch/seedling blight

Acidovorax avena subsp. citrulli (Schaad et al.) Willems
    et al.

= Pseudomonas pseudoalcaligenes subsp. citrulli

Bacterial leaf spot

Xanthomonas campestris pv. cucurbitae (Bryan) Dye

Bacterial rind necrosis

Erwinia spp.

Bacterial soft rot

Erwinia carotovora subsp. carotovora (Jones) Bergey et al.

Bacterial wilt

Erwinia tracheiphila (Smith) Bergey et al.

Brown spot

Erwinia ananas Serrano

FUNGAL DISEASES

Alternaria leaf blight

Alternaria cucumerina (Ellis & Everh.) J.A. Elliott

Alternaria leaf spot

Alternaria alternata (Fr.:Fr.) Keissl. f. sp. cucurbitae

Anthracnose (stem, leaf and fruit)

Colletotrichum orbiculare (Berk. & Mont.) Arx

= C. lagenarium (Pass.) Ellis & Halst

(teleomorph: Glomerella lagenarium Stevens)

Belly rot

Rhizoctonia solani Kühn

(teleomorph: Thanatephora cucumeris (A.B. Frank) Donk)

Black root rot

Thielaviopsis basicola (Berk. & Broome) Ferraris

Blue mold rot

Penicillium spp.

P. digitatum (Pers.:Fr.) Sacc.

Cephalosporium root and hypocotyl rot, stem streak and dieback

Acremonium spp.

= Cephalosporium spp.

Cercospora leaf spot

Cercospora citrullina Cooke

Charcoal rot (vine decline and fruit rot)

Macrophomina phaseolina (Tassi) Goidanich

Choanephora fruit rot

Choanephora cucurbitarum (Berk. & Ravenel) Thaxt.

Collapse of melon

Monosporascus eutypoides (Petrak) Arx

= Bitrimonospora indica Sivanesans et al.

Corynespora blight/target spot

Corynespora cassiicola (Berk. & M.A. Curtis) C.T. Wei

Crater rot (fruit)

Myrothecium roridum Tode:Fr.

Crown and foot rot

Fusarium solani (Mart.) Sacc. f. sp. cucurbitae W.C. Snyder
    & H.N. Hans.

(teleomorph: Nectria haematococca Berk. & Broome)

Damping-off

Acremonium spp.

Fusarium spp.

F. equiseti (Corda) Sacc.

(teleomorph: Gibberella intricans Wollenweb.)

Phytophthora sp.

Pythium spp.

Rhizoctonia solani Kühn

Thielaviopsis basicola (Berk. & Broome) Ferraris

Other fungi

Downy mildew

Pseudoperonospora cubensis (Berk. & M.A. Curtis) Rostovzev

Fusarium fruit rot

Fusarium equiseti (Corda) Sacc.

= F. roseum Link f. gibbosum W.C. Snyder & H.N. Hans.

F. graminearum Schwabe

(teleomorph: Gibberella zeae (Schwein.) Petch

F. semitectum Berk. & Ravenel

F. solani (Mart.) Sacc. f. sp. cucurbitae W.C. Snyder and
    H.N. Hans.

Fusarium spp.

Fusarium wilt

Fusarium oxysporum Schlechtend.:Fr. (with these formae speciales:) f. sp. benincasae Gerlagh & Ester (wax gourd), f. sp. cucumerinum J.H. Owen (cucumber), f. sp. lagenariae Matuo & Yamamoto (calabash gourd), f. sp. luffae Lawai et al. (vegetable sponge), f. sp. melonis W.C. Snyder & H.N. Hans. (muskmelon), f. sp. momordicae Sun & Huang (bitter melon), f. sp. niveum (E.F. Sm.) W.C. Snyder & H.N. Hans. (watermelon)

Gray mold

Botrytis cinerea Pers.:Fr.

(teleomorph: Botryotinia fuckeliana (de Bary) Whetzel)

Gummy stem blight (vine decline)

Didymella bryoniae (Auersw.) Rehm

= Mycosphaerella melonis (Pass.) Chiu & J.C. Walker

(anamorph: Phoma cucurbitacearum (Fr.:Fr.) Sacc.)

Lasiodiplodia vine decline/fruit rot

Lasiodiplodia theobromae (Pat.) Griffon & Maubl.

= Diplodia natalensis Pole-Evans

Monosporascus root rot/Myrothecium canker (black canker)

Monosporascus cannonballus Pollack & Uecker

Myrothecium roridum Tode:Fr.

Net spot

Leandria momordicae Rangel

Phoma blight

Phoma exigua Desmaz. var. exigua

= Ascochyta phaseolorum Sacc.

Purple stem

Diaporthe melonis Beraha & O'Brien

(anamorph: Phomopsis cucurbitae McKeen)

Phomopsis black stem

Phomopsis sclerotiodes Van Kesteren.

Phyllosticta leaf spot

Phyllosticta cucurbitacearum Sacc.

Phytophthora root rot

Phytophthora spp.

P. capsici Leonian

Pink mold rot

Trichothecium roseum (Pers.:Fr.) Link

Plectosporium blight

Plectosporium tabacinum van Beyma

Powdery mildew

Sphaerotheca fuliginea (Schlechtend.:Fr.) Pollacci

Erysiphe cichoracearum DC.

Pythium fruit rot (cottony leak)

Pythium spp.

Rhizopus soft rot (fruit)

Rhizopus stolonifer (Ehrenb.:Fr.) Vuill.

= R. nigricans Ehrenb.

Scab/gummosis

Cladosporium cucumerinum Ellis & Arth.

Sclerotinia stem rot

Sclerotinia sclerotiorum (Lib.) deBary

Septoria leaf blight

Septoria cucurbitacearum Sacc.

Southern blight (Sclerotium fruit and stem rot)

Sclerotium rolfsii Sacc.

(teleomorph: Athelia rolfsii (Curzi) Tu & Kimbrough)

Sudden wilt

Pythium aphanidermatum (Edson) Fitzp.

Ulocladium leaf spot

Ulocladium consortiale (Thuem.) E. Simmons

Verticillium wilt

Verticillium albo-atrum Reinke & Berthier

V. dahliae Kleb.

Web blight

Rhizoctonia solani Kühn

MISCELLANEOUS DISEASES OR DISORDERS

Air pollution injury

Ozone, sulfur dioxide and others

Bitter fruit

Sunburn injury, physiologic stress

Blossom end rot

Physiological disorder, calcium deficiency, moisture imbalance

Bottle neck of fruit

Incomplete pollination

Measles

Physiological disorder, salt toxicity

Sandburn

Physiological disorder

Sunscald (fruit)

Excessive or intense direct heat/ solar injury

Windburn

Physiological disorder

NEMATODES, PARASITIC

Dagger, American

Xiphinema americanum Cobb

Lesion

Pratylenchus spp.

Pin

Paratylenchus spp.

Reniform

Rotylenchulus reniformis Linford & Oliviera

Ring

Circonemella spp.

Root-knot

Meloidogyne spp.

Spiral

Helicotylenchus spp.

Sting

Belonolaimus longicaudatus Rau

Stubby-root

Paratrichodorus minor (Colbran) Steiner

Stunt

Tylenchorhynchus claytoni Steiner

VIRUS DISEASES

Aster yellows

MLO

Chlorotic leaf spot

Bean yellow mosaic virus (BYMV)

Curly top

Beet curly top virus (BCTV)

Cucumber green mottle

Cucumber green mottle mosaic virus (CGMMV)

Cucumber mosaic

Cucumber mosaic virus (CMV)

Cucumber vein yellowing

Cucumber vein yellowing virus (CVYV)

Lettuce infectious yellows

Lettuce infectious yellows virus (LIYVV)

Melon leaf curl

Melon leaf curl virus (MLCV)

Melon necrotic spot

Melon necrotic spot virus (MNSV)

Mosaic

Papaya ringspot virus W strain (PRSV-W)

Muskmelon vein necrosis

Muskmelon vein necrosis virus (MkVNV)

Squash leaf curl

Squash leaf curl virus (SqLCV)

Squash mosaic

Squash mosaic virus (SqMV)

Tobacco ringspot

Tobacco ringspot virus (TobRSV)

Tomato ringspot

Tomato ringspot virus (TRSV)

Tomato spotted wilt

Tomato spotted wilt virus (TSWV)

Watermelon mosaic

Watermelon mosaic virus (WMV)

Zucchini yellows

Zucchini yellows mosaic virus (ZYMV)