Phytotoxicity Tests, 1977

Abstract

Abstract This test consisted of evaluating Sumithion 8E at 4 lb ai/100 gal for phytotoxicity on 28 species of ornamentals in 3 different tests near or in Stillwater, Oklahoma. Application equipment consisted of a John Bean 55, series L-1565-2 and a 785 John Bean Spraymaster deluxe gun which delivered 3 gal/min of finish spray at 300 psi. All plants were treated to runoff. Plants were examined 24 hr., 72 hr., 1 week, 2 weeks and 4 weeks after treatment. Test 1 was applied on June 3 to young growing nursery stock. Twelve species were grown in containers and 4 species were permanent plants. Sumithion was applied to 4 single plant replicates and treated plants were compared to a check. Temperature at time of treatment was 80-85°F. Test 2 was treated on July 6 to established permanent plantings. Sumithion was applied to 2 single plant replicates including a check. Temperature at time of treatment was 90°F. Test 3 was treated on June 6 to established permanent plantings. Sumithion was applied to single plants including a check. Temperature at time of treatment was 90°F. Phytotoxicity was recorded as none, mild or severe.