The slug is the main overwintering host of this trematode. Loew prey on brown slugs. Slices of raw potato can be used to monitor brown slug populations. Better control of the brown slug is obtained by scattering baits near the edges of gardens or near shelters, and greenhouse benches. Metaldehyde is fairly effective, but metaldehyde at high concentrations is repellent to brown slugs.
Carbamates are much more effective if slugs can get to water after treatment.
The effectiveness of baits for the gray garden slug is greatly increased by placing the bait under a board, pot, or flat. For specific chemical control recommendations, see the current Cooperative Extension publications on ornamental plant pest management or consult your Extension Agent.