Diseases of Pecan
(Carya illinoinensis (Wang.) Koch.)

T. R. Gottwald, primary collator; updated by P. F. Bertrand, T. J. Michailides, B. L. Teviotdale (last update 7/24/01)

BACTERIAL DISEASES

Crown gall

Agrobacterium tumefaciens (Smith and Townsend 1907) Conn 1942

Pecan bacterial leaf scorch

Xylella fasidiosa Wells, Raju, Hung, Weisburg, Mandelco-Paul & Brenner 1987

FUNGAL DISEASES

Anthracnose

Glomerella singulata (Stoneman) Spauld. & H. Schrenk

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

Brown leaf spot

Sirosporium diffusum (Heald & F.A. Wolfe) Deighton in
    M. B. Ellis

= Cercospora fusca Rand

Clitocybe root rot

Armillaria tabescens (Scop.) Emel.

= Clitocybe tabescens (Scop.) Bres.

= C. parasitica E.M. Wilcox

Cotton root rot

Phymatotrichopsis omnivora (Duggar) Hennebert

= Phymatotrichum omnivorum Duggar

Downy spot

Mycosphaerella caryigena Demaree & J.R. Cole

    Pseudocercosporella caryigena (Ellis & Everh.) Sivanesan
    [anamorph]

Eutypa dieback

Eutypella scorparia (Schwein.:Fr.) Ellis & Everh.

= Eutypa heteracantha (Sacc.) Sacc.

Gnomonia leaf spot

Gnomonia dispora Demaree & J.R. Cole ex Barr

Heart rot

Schizophyllum commune Fr.:Fr.

Leaf blotch

Mycosphaerella dendroides (Cooke) Demaree & Cole

    = Cercospora halstedii Ellis & Everh. [anamorph]

Liver spot

Gnomonia caryae F. A. Wolf

    Asteroma caryae (peck) Sutton [anamorph]

Nursery blight

Elsinoë randii Jenk. & Bitancourt

    Sphaceloma randii Jenk. & Bitancourt [anamorph]

Physalospora canker

Physalospora abdita (Berk. & M.A. Curtis) N. Stevens in
    Voorhees

= P. fusca N. Stevens

Botryosphaeria rhodina (Cooke) Arx

= Physalospora rhodina Cooke)

Phytophthora shuck and kernel rot

Phytophthora cactorum (Lebert & Cohn) J. Schröt.

Pink mold

Trichothecium roseum (Pers.: Fr.) Link

= Cephalothecium roseum Corda

Powdery mildew

Microsphaera penicillata (Walr.: Fr.) Lév

Scab

Fusicladium effusum G. Winter

Septoria leaf spot

Septoria caryae Ellis & Everh.

Thread blight

Ceratobasidium sp.

Twig die back

Botryosphaeria dothidea (Moug.:Fr.) Ces. & de Not.

    Fusicoccum aesculi Corda [anamorph]

Vein spot

Gnomonia nerviseda J.R. Cole

    Leptothyrium nerviseda J.R. Cole [anamorph]

Violet root rot

Helicobasidium brebissonii (Desmaz.) Donk

    Rhizoctonia crocorum (Pers.: Fr.) DC. [anamorph]

Zonate leaf spot

Grovesinia pyramidalis M. Cline, Crane & Cline

    Cristulariella moricola (Hino) Redhead [anamorph]

NEMATODES, PARASITIC

Ring nematode

Mesocriconema xenoplax (Raski) Loof & de Grisse

Root knot nematode

Meloidogyne arenaria (Neal) Chitwood

M. incognita (Kofoid & White) Chitwood

M. javanica (Treub) Chitwood

M. partityla Kleynhans

PHYTOPLASMAL DISEASES

Bunch disease

Phytoplasma in subgroup III

PARASITIC HIGHER PLANTS

Eastern leafy mistletoe

Phoradendron serotinum (Raf.) M.C. Johnst.

= P. flavescens (Pursh) Nutt.

MISCELLANEOUS DISEASES AND DISORDERS

Algal leaf spot and twig infection

Cephaleuros virescens Kunze

Little leaf

Unknown

Mouse ear

Unknown

Rosette

Zinc deficiency

Shuck decline

Unknown

Stem end blight

Unknown