Abstract
Abstract ‘Silver Queen’ sweet corn was planted 27 May at Rock Springs Experimental Farm, Centre County, PA. Plant spacing was 9 inches with 30 inches between rows. Plots were 3 rows x 47 ft arranged in a randomized complete block design with 4 replicates. Insecticides were applied 14, 26 Aug with a high-clearance sprayer delivering 30 gal/acre at 14 psi. Sweet corn was in pollen shedding stage at the first application and had an 8% European corn borer (ECB) infestation. On 2 Sep, 25 ears per plot were selected and examined for signs of insect feeding externally (silks and sides) and internally (kernels and ear tips). Numbers of ECB larvae were counted. Stalk damage caused by ECB was assessed by splitting 10 stalks/plot and counting the number of cavities. Rainfall totalled 3.75 inches for Jun, 5.00 inches for Jul, and 2.18 inches for Aug. Average daily maximum and minimum temperatures (°F) were 84 and 39 for Jun, 91 and 51 for Jul, and 83 and 45 for Aug, respectively.
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