Slime Mold
Physarum spp. or similar myxomycetes
2 host plants · Fungal
Last updated
You'll see white-to-yellow gelatinous sheets emerging from soil surface on strawberry and other hosts, later forming yellow to purple-brown masses. Despite its alarming appearance, slime mold causes no plant damage since it feeds only on decaying organic matter. It's purely aesthetic. Simply mow, rake, or wash off the structures with a strong water stream. The problem disappears within 1-2 weeks on its own.
Good sanitation is your most effective tool against slime mold. Remove and dispose of infected plant material, clean up fallen debris, and sterilize your pruning tools between plants. Reduce leaf wetness by watering at soil level and spacing plants for adequate air movement. These practices reduce the pathogen load in your garden over successive seasons.
Quick Reference
Management
Spring through fall in humid conditions; particularly visible mid-summer.
High humidity and warm temperatures (15-25°C / 59-77°F); saprophytic, grows on leaf/stem surfaces.
Cultural Controls
- Mowing, raking, or washing will remove small slime molds.
- Larger masses can be removed with a shovel or a strong stream of water.