Leaf Miner Control on Greenhouse Chrysanthemums, Georgia, 1980

An experiment was conducted at a commercial chrysanthemum range in Coweta Co., GA. Five insecticide formulations were evaluated for efficacy in controlling leaf miners on chrysanthemums grown for pot flower production on raised greenhouse benches. Cuttings were stuck Jun 25, moved out of propagation Jul 8, pinched Jul 22, spaced Aug 12, and ready for shipping approximately Sep 1, Foliar sprays were applied Jul 9 and every 7 days thereafter until the last application on Aug 6 (Temp 27 - 30C). Application was to run-off utilizing a 8003 nozzle and 80 psi. Treatment plots were 20 to 25, 165 mm Azalea pots replicated 4 times. Each replication was a bench of 1 of 4 cultivars: ‘Pot-O-Gold’, ‘Butterball’, ‘Tip’, and ‘Garland’. Treatments were evaluated by placing a pot on a 26 cm diameter by 2.5 cm deep polystyrene tray (5 in each treatment block). Leaf miner larvae and/or pupae captured in the trays were counted each week. Treatments were evaluated on Aug 27 for marketability. Five plants in each treatment block were rated on a scale of 0 (no damage) to 10 (every fully developed leaf damaged).