NCSU Plant Disease and Insect Clinic
Terms to Describe Plant Symptoms
Illustrated Glossary of Terms to Describe Plant Diseases and Disorders
SYMPTOMS AND SIGNS
Last update: 04‐Jun‐2012 by M.J. Munster
Chlorosis
Chlorosis = yellowing
Necrosis = death of cells/tissues
Interveinal Chlorosis
Illustrated Glossary of Plant Symptoms
and Pathogen Signs
Necrotic leaf spots
with chlorotic
with chlorotic halos
1
NCSU Plant Disease and Insect Clinic
Shot‐‐Hole
Shot
Water‐‐soaking
Water
Photo Credit: Cre
eswell or Warfiedl?
Stippling
Mosaic and Mottle
Mosaic and Mottle
Plant Pathology Depa
artment Slide Collection
Scorch
Illustrated Glossary of Plant Symptoms
and Pathogen Signs
2
NCSU Plant Disease and Insect Clinic
Chimera
Late Blight
Wilting
Root Rot
Damping‐Off
Damping‐
(Post‐‐Emergence)
(Post
Illustrated Glossary of Plant Symptoms
and Pathogen Signs
Plant Pathology Depa
artment Slide Collection
Ringspot
3
NCSU Plant Disease and Insect Clinic
Vascular Discoloration
Vascular Discoloration
Rot or Decay
Dieback
Canker
Canker
Illustrated Glossary of Plant Symptoms
and Pathogen Signs
4
NCSU Plant Disease and Insect Clinic
Gummosis/Resinosis
Gummosis/
Resinosis
Defoliation
(Leaf Drop)
Needle Cast
Malformation
Galls (leaf)
Galls (root)
Illustrated Glossary of Plant Symptoms
and Pathogen Signs
5
NCSU Plant Disease and Insect Clinic
Galls (stem)
Witch’s Broom
Stunting
No symptoms at all!
Mycelium / Mycelium / Hyphae
Hyphae
Terms to D
Describe ib
Pathogen Signs
Illustrated Glossary of Plant Symptoms
and Pathogen Signs
6
NCSU Plant Disease and Insect Clinic
Powdery Mildew
Gray Mold
Sclerotia
Rust –– Telial Horns
Rust Quince rust on juniper
Rust ‐‐ Aecia
Rust Illustrated Glossary of Plant Symptoms
and Pathogen Signs
7
NCSU Plant Disease and Insect Clinic
Rust ‐‐ Uredinia
Rust White Rust of Chrysanthemum
Image Source: USDA Systematic Mycology and Microbiology Laboratory
Mushrooms and Conks
Slime Mold Fruiting Body
Smut
Dodder
Illustrated Glossary of Plant Symptoms
and Pathogen Signs
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