Draw the snails out by watering the yard in the afternoon. Then go back after dark and collect them. Do this daily when snails are troublesome. One way to keep these pests out of vegetable gardens or away from individual plants is to use a barrier of an irritating substance. They won t cross over materials like wood ashes, lime, or coarse sand.
Barriers are most effective where they remain dry.
Often the quickest, most successful control of snails and slugs comes with the use of chemical baits. If you ve tried snail baits before without any luck, you may have been using a metaldehyde bait during moist, cool weather. Metaldehyde is not effective when days are cloudy, foggy, or rainy. Mesurol bait is effective under both dry and moist conditions. Mesurol cannot be used in the vegetable garden.