Monterey Sluggo Snail & Slug Killer is OMRI Listed for organic gardening. Kills snails and slugs. Can be used around pets and wildlife. Uses iron phosphate which naturally occurs in soil. Easy-to-use granular formulation. Remains effective after rain or sprinkling. May be used up to and including day of harvest. Ingredients: Iron Phosphate 1.0%, Other Ingredients 99.0%.