This article is a list of diseases of pecan trees (Carya illinoinensis).
Bacterial diseases
| Bacterial diseases | |
|---|---|
| Crown gall | Agrobacterium tumefaciens |
| Pecan bacterial leaf scorch | Xylella fastidiosa |
Fungal diseases
| Fungal diseases | |
|---|---|
| Anthracnose |
Glomerella cingulata |
| Brown leaf spot | |
| Clitocybe root rot |
Armillaria tabescens |
| Cotton root rot | |
| Downy spot |
Mycosphaerella caryigena |
| Eutypa dieback | |
| Gnomonia leaf spot | |
| Heart rot | |
| Leaf blotch |
Mycosphaerella dendroides |
| Liver spot |
Gnomonia caryae |
| Nursery blight |
Elsinoë randii |
| Pecan scab | |
| Physalospora canker |
Physalospora abdita |
| Phytophthora shuck and kernel rot | |
| Pink mold | |
| Powdery mildew | |
| Scab | |
| Septoria leaf spot | |
| Thread blight |
Ceratobasidium sp. |
| Twig die back |
Botryosphaeria dothidea |
| Vein spot |
Gnomonia nerviseda |
| Violet root rot |
Helicobasidium brebissonii |
| Zonate leaf spot |
Grovesinia pyramidalis |
Nematodes, parasitic
| Nematodes, parasitic | |
|---|---|
| Ring nematode | |
| Root knot nematode |
Meloidogyne arenaria |
Phytoplasmal diseases
| Phytoplasmal diseases | |
|---|---|
| Bunch disease | Phytoplasma in subgroup III |
Virus diseases
Pecan mosaic-associated virus, potyvirus
Miscellaneous diseases and disorders
| Miscellaneous diseases and disorders | |
|---|---|
| Algal leaf spot and twig infection | Cephaleuros virescens |
| Little leaf | Unknown |
| Mouse ear | Nickel deficiency |
| Rosette | Zinc deficiency |
| Shuck decline | Unknown |
| Stem end blight | Unknown |