American agricultural sciences company with its head office in Philadelphia, Pennsylvania, founded in 1883 as a maker of insecticide sprayers and listed in New York, which sold its lithium and other businesses to concentrate on crop protection. Discovers, makes and sells insecticides, herbicides, fungicides and biological crop products for growers worldwide, and runs its own research and development centre and regulatory science laboratories carrying out toxicology, residue, metabolism and environmental fate studies for product registration.
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