Forestry glossary
Spot
Circular or nearly circular lesions that appear on a leaf blade. They have a central zone of necrotic (dead, brown) tissue colonized by a pathogen; this zone is surrounded by healthy, coloured tissue.
Circular or nearly circular lesions that appear on a leaf blade. They have a central zone of necrotic (dead, brown) tissue colonized by a pathogen; this zone is surrounded by healthy, coloured tissue.