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Abstract
Two firms accounted for 74 percent of the corn herbicide market and two firms accounted for 61 percent of the soybean insecticide market in 1976. This study examines the pesticide industry by component markets for specific types of pesticides and crops. The share of the market accounted for by leading producers when the industry is examined by these specialized markets is much greater than in analyses reported elsewhere which considered the pesticide industry as a single market. The relative positions of leading pesticide-producing firms shifted significantly during 1966-76.