Control of the Two-Spotted Spider Mite on Lima Beans, on Long Island

Abstract

Several compounds were tested as dusts and sprays in 1947 for control of Tetranychus bimaculatus and insects on lima beans. Mite infestations were artificially created. A mixture containing 1% of parathion dust gave a 44.3% increase in the wt. of clean pods over the checks, with little evidence of aphid and Mexican bean beetle infestation. The most promising results with sprays were obtained with 1 pint of hexaethyl tetraphosphate or 1 quart of a 50% soln. of chlorinated camphene per 100 gal. of water. The gains in terms of clean pods over checks averaged about 30% for both treatments.