An automatic molluscicide dispenser for use in flowing water

The author describes the design and operation of an automatic molluscicide dispenser for use in flowing water. The equipment, which consists basically of a measuring weir coupled to a float-activated siphon, was designed for simplicity, low cost, construction with commonly available materials, and operation by untrained personnel. Observations in the field have shown that the dispenser increases the accuracy and consistency of dosage, reduces manpower requirements, and improves molluscicidal effectiveness.