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Coffee kills slugs better than the most commonly sold poison bait for slugs.
According to the United States Department of Agriculture's Agricultural Research Service in Hilo, Hawaii, concentrations of as low as 0.01 percent caffeine repel slugs. A cup of instant coffee contains 0.05 percent caffeine. In studies, a solution of one to two percent caffeine kills most slugs within two days.
Placing coffee grounds around plants will deter slugs, but liquid coffee is even more beneficial. Spray cold coffee on leaves and soil around the plants. Reapply after rains or overhead watering.
The studies show that caffeine is more effective than metaldehyde which is the most commonly used poison for slugs. Metaldehyde is fatal to pets and wildlife.
Slugs can be easily controlled without endangering animals and small inquisitive children.
Author Marilyn Pokorney
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Copyright Marilyn Pokorney 2018