leaf blotch

noun

, Plant Pathology.

1. a symptom or phase of certain especially fungal diseases of plants, characterized by necrotic discoloration of the leaves.
2. any disease so characterized.

Word History and Origins

Origin of leaf blotch¹

First recorded in 1905–10

Example Sentences

This fungus causes septoria leaf blotch in wheat, a serious disease in temperate climates, estimated to cause more than £250 million per year in costs in the UK alone due to harvest loss and fungicide spraying.

From Science Daily