Use of Labeled and Experimental Insecticides for Control of European Corn Borer on Sweet Corn in Wisconsin, 1995

‘Heritage’ sweet corn was planted at the Arlington Agriculture Research Station, Arlington, WI at 23,000 seeds per acre on 15 June. Each treatment was 6 rows wide and 60 feet long, arranged in a RCBD, replicated four times. The sprays were applied 6, 11, 17 and 25 August. All treatments were applied with a high clearance sprayer equipped with D2/23 TeeJet disc-core nozzles and delivered 10.76 gallons of finished spray per acre at 40 PSI when driven at 2.5 MPH. Plots were evaluated 8 September by removing 25 ears per treatment and recording number of damaged ears and the size of larvae present. “Early” ECB larvae were shorter than ¼ inch, “mid” larvae are longer than ¼ inch but shorter than ½ inch, and “late” larvae were longer than ¾ inch.