Open AccessMicrobial and Insecticidal Control of Late-Season Insect Pests of Minnesota Sweet Corn, 1990
Author(s) -
W. D. Hutchison,
David W. Bartels
Publication year - 1991
Publication title -
insecticide and acaricide tests
Language(s) - English
Resource type - Journals
ISSN - 0276-3656
DOI - 10.1093/iat/16.1.75a
Subject(s) - sprayer , randomized block design , acre , larva , infestation , agronomy , biology , crop , agricultural experiment station , horticulture , toxicology , agriculture , botany , ecology
This test was conducted on the University of Minnesota Agricultural Experiment Station at Rosemount in corn planted 14 Jun. Two-row plots, 30 ft long, and separated by one skip-row and 4 ft borders at the end of each plot, were arranged in a randomized complete block design. A backpack CO2 sprayer with one flat-fan (LF-3) nozzle/row, delivering 27 gal/acre at 40 psi, was used to treat the ear zone of each row. First fresh silks were observed 15 Aug and treatments were applied 22, 29 Aug and 5 Sep. Plots were artificially infested with about 20 neonate ECB larvae/plant on 27 Aug. A very heavy natural infestation of CEW also developed. All plots were evaluated 10 Sep by randomly selecting 25 ears/plot (100/treatment), husking the ears and recording total ECB and CEW larvae, larval size and location of feeding damage.
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