The Spanish slug is very active and mobile. Therefore, it is difficult to control them. One method is not enough. It is necessary to use several methods together.
People should first make a defense plan. When making the plan, one should consider how much time and money is available. Resources and efforts can be shared with neighbors.
Electric fences can help a lot. For example, one can use SnailStop fences. If the neighbor does nothing, this is a good solution.
Slug collection has been promoted, but it is not always effective. Slugs are active at night. Collection should be done multiple times and combined with other methods.
Poisons and traps also help. Beer traps attract slugs. Czech Pilsner beer is very effective. Fermented milk also works.
One can place trap plants in the garden, such as lettuce. Slugs gather there and can be easily collected. Artificial hiding places, such as mats, also help.
Iron phosphate-based granules disrupt the digestion of slugs. They need to be used repeatedly, as rain may reduce their effectiveness.
Natural enemies, such as birds and hedgehogs, eat slugs. Moles and starlings also help. The more different methods are used, the more effective the fight will be.
Traps should be set out in spring. During dry periods, the fight is more effective, as slugs have fewer resources.
Consistency is very important. Every landscape is different, so there is no one-size-fits-all solution. If one acts consistently, the number of slugs can be reduced.