leaf blotch

American  

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.

---

Etymology

Origin of leaf blotch

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