Slugs and Snails in Yards, Kennels and Premises
Slugs and snails move onto hard standing, runs and kennel yards from surrounding vegetation, especially in wet weather. Habitat management and barriers work best, and baiting choices are narrowing. Vegalab's Slug Control is labeled for crop use; premise use is in development.
Species and behavior
The gray field slug (Deroceras reticulatum) is the most damaging species in temperate agriculture and gardens; Arion species and the garden snail (Cornu aspersum) are common around buildings. They are nocturnal, need moisture, and shelter by day under boards, stones, pallets, leaf litter and dense ground cover. Eggs are laid in clutches in damp soil and hatch in two to four weeks. Activity peaks in mild, wet spring and autumn weather, when they cross paths and runs and gather at water bowls and feed.
Control options are changing
Metaldehyde pellets were withdrawn for outdoor use in Great Britain from 31 March 2022, citing risks to birds and mammals. Ferric phosphate baits are now the main pellet option in many markets. Non-chemical measures carry more weight: remove daytime refuges, keep grass short along runs, use copper or abrasive barriers, and trap and remove. In animal housing, pellets must be placed where pets and livestock cannot reach them. Check pellet labels for pet and wildlife precautions.
Slug Control status
Slug Control is based on tea saponin, a triterpenoid saponin from Camellia seed meal that acts on mollusk surface tissue. Its current label is for crop and plant use. Use on kennel runs, yards and farm premises requires a label amendment and state acceptance and is in development. Tea saponin is highly toxic to fish, so any premise use must keep runoff away from ponds, ditches and drains. Trials will measure rainfastness on hard surfaces.
Key facts
- Outdoor use of metaldehyde slug pellets ended in Great Britain on 31 March 2022 (Defra, Metaldehyde withdrawal decision, 2020)
- Deroceras reticulatum is the principal pest slug in temperate arable and horticultural systems (South 1992, Terrestrial Slugs: Biology, Ecology and Control, Chapman and Hall)
- Tea seed saponins are toxic to fish, which is the basis for their use to clear predatory fish from shrimp ponds (Terazaki, Tharnbuppa and Nakayama 1980, Aquaculture 19:235)
How our delivery technology applies
Saponins act on contact with the mollusk body surface, but rain washes them off and soil binds them, so activity on a yard surface fades quickly. Encapsulation can anchor tea saponin to the treated surface and release it when slugs cross, improving rainfastness, and a shell reduces the free saponin load available to move in runoff toward water. Both effects need measurement before any premise claim.
Kennel and yard operators can register interest in Slug Control premise trials.
Related reading
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