Monosodium methanearsonate (MSMA) is an organic arsenical pesticide currently registered for use in the United States. MSMA is a broad spectrum herbicide used to control grasses and broadleaf weeds. It can only be used on cotton, sod farms, golf courses, and highway rights-of-way, and cannot be used in Florida except for on cotton in certain counties.

• Background -- Organic arsenical pesticides
• Uses of MSMA
• Registration review
• Scientific peer review
• Safe use and disposal of products
• For more information