This article is a list of diseases of pecan trees (Carya illinoinensis).
Glomerella cingulata Colletotrichum gloeosporioides [anamorph] Sirosporium diffusum = Cercospora fusca = Clitocybe tabescens = Clitocybe parasitica Phymatotrichopsis omnivora = Phymatotrichum omnivorum Mycosphaerella caryigena Pseudocercosporella caryigena [anamorph] Eutypella scorparia = Eutypa heteracantha Gnomonia dispora Schizophyllum commune Mycosphaerella dendroides = Cercospora halstedii [anamorph] Gnomonia caryae Asteroma caryae [anamorph] Elsinoë randii Sphaceloma randii [anamorph] Fusicladium effusum Physalospora abdita = Physalospora fusca Botryosphaeria rhodina = Physalospora rhodina Phytophthora cactorum Trichothecium roseum = Cephalothecium roseum Microsphaera penicillata Cladosporium caryigenum Septoria caryae Ceratobasidium sp.
Botryosphaeria dothidea Fusicoccum aesculi [anamorph] Gnomonia nerviseda Leptothyrium nervisedum [anamorph] Helicobasidium brebissonii Rhizoctonia crocorum [anamorph] Grovesinia pyramidalis Cristulariella moricola [anamorph] Mesocriconema xenoplax Meloidogyne arenaria Meloidogyne incognita Meloidogyne javanica Meloidogyne partityla Pecan mosaic-associated virus, potyvirus