Turn over or remove anything that holds water for a week or longer. To kill mosquito larvae in rain barrels, pour one to two capfuls of bleach into the barrel. This does not harm the plants when you water. Low-lying areas should also be filled in. Slugs cause considerable damage to gardens.
Slugs feed at night.
During the day they seek cool, dark and damp places. They prefer succulent fruit or leaves. Reduce overcrowding of garden plants so that air and sunlight can reach the ground to dry it out. Keep the soil on the drier side. Regularly remove decaying vegetation from the garden or surrounding area.