LIBERTYVILLE, Ill.--(BUSINESS WIRE)--Valent BioSciences Corporation (VBC) today announced the official launch of their latest biorational larvicide MetaLarvTM S-PT Mosquito Growth Regulator for use in professional mosquito abatement programs in the U.S. MetaLarv S-PT features Triple Release TechnologyTM – an advanced formulation that provides several key improvements over current (S)-methoprene products.