All contaminants

Verticillium (Dry Bubble)

Lecanicillium fungicola

High

Causes distorted, stunted mushrooms with tilted caps, thickened stipes, and circular pale brown spots. Spreads via sticky spores on water splash, flies, pickers, and equipment.

Verticillium (Dry Bubble) — reference photo

Visual Identification

Distorted, stunted mushroom growth with tilted caps, thickened stems, and circular pale brown spots on caps.

Treatable

Sign up free to see how to identify and treat Verticillium (Dry Bubble)

A free First Flush account unlocks the full identification checklist, recommended response, and step-by-step treatment for all 10 contaminants — plus the ability to log a contamination on one of your own grows and track its outcome.