Sawfly Control, 1990

Materials were applied on 15 Jun to 20 × 20 ft plots in a crop-year blueberry field at Township 19, Maine. There were 3 replications of each treatment in a randomized complete block design with 5-ft untreated buffer strips around each plot. Insecticides were applied at a rate of 25 gal/acre using CO2-propelled, 30-inch boom sprayer with 4 flat-spray 800067 Teejet nozzles operating at 35 psi. Plants showed 10% bloom and 90% fruit set at treatment. On sample dates indicated in table, 10 sweeps with a standard 12-inch sweep net were taken from the center of each plot; the larvae were counted and then released over the same plot. There were no unusual weather conditions during the test. Temperatures were generally warm; 1.4 inches of rain fell on 24 Jun.