Slugs and Snails

Chewed caps and slime trails on mushrooms, usually found in the morning after humid or cloudy nights.

Likely causes

• Damp shelter near the grow: debris, weeds and stones
• Wet climate and shaded outdoor logs

What to do

Clear plant debris, weeds and stones around the growing area, set traps, and collect slugs by torchlight at night. Keep the ground surface dry and use slug bait where it is allowed.

Easily confused with

• Beetles and Moths in Fruit Bodies

Not sure?

Walk through the troubleshooting guide, ask the AI Grow Consultant, or check the conditions your species needs on its species page.

Sources

• Mushroom Growers' Handbook 2: Shiitake Cultivation (MushWorld, 2005; Spanish edition by CERZOS), chapter 5 'Slugs and snails' (MushWorld). Slugs and snails are among the most serious pests of log-grown shiitake because they feed directly on the caps; they are active at night and on cloudy or misty days and hide in damp places; control combines removing daytime refuges such as plant debris, weeds and stones, trapping, regular hand collection with a torch at night into soapy water, keeping the soil surface dry and using bait.

Last updated: 2026-10-19