Over half of all U.S. farmers use pesticides to control crop pests on about 50 percent of their cropland acres. In 1971, about 45 percent of the farmers growing crops used herbicides, 26 percent used insecticides, 6 percent used fungicides, 2 percent used nematocides, and 10 percent used other pesticides (including defoliants, desiccants, growth regulators, miticides, and rodenticides). Farmers treated 41 percent of cropland acres (not including pasture and rangeland) with herbicides, and 15 percent with insecticides, 2 percent with fungicides, less than 1 percent with nematocides, and about 1 percent with other pesticides.