Evaluation of Five Insecticides to Control A Natural Infestation of First Brood Larvae of European Corn Borer in Northeast Nebraska, 1975

Foliar treatments of registered and non-registered insecticides for first brood corn borer control were applied to center-pivot irrigated corn plots in Cedar County, Nebraska on July 10. All insecticides were applied as whorl treatments over the row. The experiment was arranged in a randomized complete block with 4 replications. One row (50 ft long, 30 inch row spacing) was used for each treatment/replication. From each 50 ft treatment, one half of the row was used to determine the number of corn borer cavities and within the other half 17.4 ft of row was hand harvested and converted to bu of no 2 corn/acre. On August 11,10 corn plants from each treatment/replication were split in half from the tassel to the ground, examined, and numbers of corn borer cavities recorded.