Diseases of Cranberry
(Vaccinium macrocarpon Ait. = Oxycoccus
macrocarpus (Ait.) Pers.)

Steven N. Jeffers and Donald M. Boone, primary collators

FUNGAL DISEASES

Bitter rot

Glomerella cingulata (Stoneman) Spauld. & H. Schrenk

= G. cingulata (Stoneman) Spauld. & H. Schrenk var. vaccinii Shear

    Colletotrichum gloeosporioides (Penz.) Penz. & Sacc. in Penz. [anamorph]

Black rot

Allantophomopsis cytisporea (Fr.:Fr.) Petr.

= Apostrasseria lunata (Shear) Nag Raj

= Ceuthospora lunata Shear

    Phacidium lunatum DiCosmo et al. [teleomorph]

Allantophomopsis lycopodina (Hohn.) Carris

Strasseria geniculata (Berk. & Broome) Hohn.

= S. oxycocci (Shear) Shear

Black spot

Mycosphaerella nigromaculans Shear

    Ramularia nigromaculans Shear [anamorph]

Blotch rot

Physalospora vaccinii (Shear) Arx & E. Müller

= Acanthorhynchus vaccinii Shear

Botryosphaeria fruit rot and berry speckle

Botryosphaeria vaccinii (Shear) Barr

= Guignardia vaccinii Shear

    Phyllosticta elongata G. J. Weidemann in G. J. Weidemann et al. [anamorph]

Cladosporium leaf spot

Cladosporium oxycocci Shear

Cottonball (hard rot and tip blight)

Monilinia oxycocci (Woronin) Honey

= Sclerotinia oxycocci Woronin

Early rot (scald)

Phyllosticta vaccinii Earle

End rot

Godronia cassandrae Peck

= G. cassandrae Peck f. vaccinii Groves

    Fusicoccum putrefaciens Shear [anamorph]

Fairy ring

Psilocybe agrariella Atk. var. vaccinii V. Charles

Fruit rots (miscellaneous)

Gloeosporium minus Shear

Penicillium spp.

Pestalotia vaccinii (Shear) Guba

= Pestalotia (= Pestalozzia) guepini Desmaz. var. vaccinii Shear

Synchronoblastia crypta Uecker & Caruso

Leaf spots and leaf drops (miscellaneous)

Botryosphaeria vaccinii (Shear) Barr

Eupropolella oxycocci (Dearn. ex Cash) B. Eriksson

= Naevia oxycocci Dearn. ex Cash in Shear et al.

Godronia cassandrae Peck

Pestalotia vaccinii (Shear) Guba

Pyrenobotrys compacta (Peck) B. Eriksson

= Gibbera compacta (Peck) Shear

= Venturia compacta Peck

Phytophthora root and runner rots

Phytophthora spp.

P. cinnamomi Rands

Powdery mildew

Microsphaera vaccinii (Schwein.) Cooke & Peck

= M. penicillata (Wallr.:Fr.) Lév. var. vaccinii (Schwein.) W. B. Cooke

Protoventuria (Gibbera) leaf spot and berry speckle

Protoventuria myrtilli (Cooke) Barr

= Gibbera myrtilli (Cooke) Petr.

Red gall (cranberry gall)

Synchytrium vaccinii F. Thomas

Red leaf spot

Exobasidium rostrupii Nannf.

= E. vaccinii (Fuckel) Woronin

Red shoot

Exobasidium perenne N. Nickerson

Ripe rot (white rot)

Coleophoma empetri (Rostr.) Petr.

= Sporonema oxycocci Shear

Rose bloom

Exobasidium oxycocci Rostr. ex Shear

Rust

Pucciniastrum vaccinii (G. Wint.) Jorst.

= P. myrtilli (Schumach.) Arth.

Twig blight

Lophodermium hypophyllum (Dearn. & House) Shear in Shear et al.

= L. ocycocci (Fr.) P. Karst. var. hypophyllum Dearn. & House

L. oxycocci (Fr.) P. Karst.

Upright dieback

Phomopsis vaccinii Shear in Shear et al.

    Diaporthe vaccinii Shear in Shear et al. [teleomorph]

Synchronoblastia crypta Uecker & Caruso

Viscid rot

Phomopsis vaccinii Shear in Shear et al.

Yellow rot

Botrytis sp.

NEMATODES, PARASITIC

Lesion

Pratylenchus spp.

Ring

Criconemoides spp.

Sheath

Hemicycliophora spp.

Spiral

Helicotylenchus spp.

Stubby-root

Trichodorus spp.

Stunt

Tylenchorhynchus spp.

PHYTOPLASMAL DISEASES

False blossom (Wisconsin false blossom)

VIRAL DISEASES

Ringspot

(Virus suspected)

DISEASES CAUSED BY PARASITIC SEED PLANTS

Dodder

Cuscuta compacta Juss.

C. gronovii Willd.

PHYSIOLOGICAL DISORDERS

Flooding injury

Oxygen deficiency

Purple berry

Physiological

Sterile breakdown (physiological breakdown, physiological rot)

Physiological (triggered by bruising or some other injury)

Sun scald (sunburn)

Overheating of fruit from direct exposure to sun