| Popis: |
This test was conducted on the University of Minnesota Agricultural Experiment Station at Rosemount in corn planted 13 Jun. Two-row plots, 30 ft long with 4 ft alleys, and separated by one skip-row, were arranged in a randomized complete block design. A backpack COa sprayer with two hollow-cone (TX-10) nozzles/row, delivering 25 gal/acre at 33 psi, was used to treat the ear zone of each row. A 5-7 day spray schedule was maintained with the first spray initiated at 20% silk. Treatments were applied 18, 23, 30 Aug, and 6 Sep. Plots were artificially infested with about 25 neonate ECB larvae/ear on 27 Aug. A large natural infestation of CEW also developed. Treatments were evaluated 12 Sep by randomly selecting 25 ears/plot (100/treatment) and recording total ECB and CEW larvae, larval size and location, and feeding damage. |
