ABSTRACT
Rats and other rodents represent structural, agricultural, and health pests. Commensal rodents destroy or contaminate food products in all phases of food manufacture and use. The general approach to rat and mouse control lies in environmental restructuring through sanitation, improved food storage, and ratproofing of dwellings. Rodenticides are usually considered supplemental to measures. Pest marine life might be controllable through the use of repellents, the depredations arising from shark attack, especially on downed pilots, has been well documented. Toxic collars constitute a rather special form of controlled release, in that the toxic element is only released at the time of target attack and tends to be a "one-shot" control method, unlike baits or the continuous release associated with insect and plant control. Repellents have been evaluated; one, a controlled release tributyltin sulfide in an acrylic base, prepared at the University of Akron, performed well under laboratory conditions.
