Cottony white fuzz

Signs to check

• Clumps measuring 2 to 5 mm (0.08 to 0.2 in), with a waxy, sticky texture rather than a powdery one.
• Most often found where the leaf joins the stem, or along the veins.
• Small oval insects may become visible when you part the fuzz.
• Localized colonies rather than an even covering over the leaf.

Common causes

1. Powdery mildew · A white, powdery coating on leaves and stems.
2. Anthracnose · Brown or black spots, often sunken and surrounded by a halo.

What you see on the leaves

• Black coating (sooty mold)
• Dry, brown leaf edges
• Lower leaves turning yellow
• Deformed or twisted leaves
• Brown spots on leaves
• Large black patch
• General yellowing of leaves
• Yellow leaves with green veins
• Curling leaves
• Brown leaf tips
• Clean-edged holes in leaves
• Wilting leaves