Large black spot

Signs to check

• The spot measures more than 1 cm (about 0.4 in) across and has circular or irregular edges.
• A yellow or paler ring is often visible around the black border.
• The center may become dry, brittle and grayer over time.
• It can appear on young or old leaves, on either surface.
• The spot gradually enlarges and may merge with others to form large necrotic areas.

Common causes

1. Anthracnose · Brown or black spots, often sunken and surrounded by a halo.

What you see on leaves

• White cottony growth
• Black coating (sooty mold)
• Dry brown leaf edges
• Yellowing bottom leaves
• Distorted or twisted leaves
• Brown leaf spots
• General leaf yellowing
• Yellow leaves with green veins
• Curling leaves
• Brown leaf tips
• Clean holes in leaves
• Wilting leaves