Pepper Bacterial SpotIdentification & Treatment Guide 2026
Xanthomonas euvesicatoria · Family: Xanthomonadaceae
Pepper bacterial spot (Xanthomonas euvesicatoria) causes small dark water-soaked leaf spots that turn brown with yellow halos, and raised scab-like fruit lesions. Spread by rain splash and seed. Manage with clean seed, copper + mancozeb sprays, resistant varieties, drip irrigation, and crop rotation. Copper resistance is increasing — rotate management tools.
Scan This Plant NowQuick Diagnosis
highPepper Bacterial Spot
- Affects
- leavesstemsfruit
- Peak Season
- Warm wet weather (24-30°C) with frequent rain events
- Spread Risk
- Fast
- Spread By
- Rain splash, wind-driven rain, seed-borne, contaminated transplants, overhead irrigation
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Symptoms: What does Pepper Bacterial Spot look like?
Visual identification guide — tap each stage for details
Small dark water-soaked spots on leaves
Tiny (1-3 mm) dark green, water-soaked, circular spots appear on lower leaves. Spots look greasy or oily when backlit.
Brown spots with yellow halos and defoliation
Spots enlarge to 3-5 mm, turning dark brown with yellow halos. Spots may become angular when bounded by veins. Severe infections cause extensive defoliation, exposing fruit to sunscald.
Raised scab-like fruit lesions
Fruit develops raised, scab-like, rough-textured brown lesions (2-5 mm). Spots may crack open, allowing secondary rot organisms to enter. Severely spotted fruit is unmarketable.
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