Control of Bagworms on Chinese Arborvitae, 1982

Abstract

Bagworm control was evaluated on a Chinese arborvitae hedge located in Stillwater, OK. Seventy-five ft of hedge was utilized and teatments were randomized and replicated 3 times. Each treatment consisted of a 5 ft section 8-10 ft high. Plants were sprayed until run-off with a Marco R-20 sprayer which delivered 1.6 gal/min at 200 psi. Treatments were made on Jul 8, when the temperature was 90 F and wind velocity ranged from 0-5 mph. A pretreatment count from 10 locations on each of the 9 replications showed an average of 9.5 larvae, 0.25 to 0.75 inches long, per 18 inches of terminal branch. Mortality was determined by examining 10 larvae from each replication at 1, 3, 7, 14 and 21 days after application.