Soybean aphid, Aphis glycines Matsumura is a new exotic insect pest in the U.S. Eighty, “0” and “00” soybean varieties were evaluated under a controlled environment to identify any inherent resistance and/or tolerance to the soybean aphid on an index rating scale for aphid population and plant injury. Varieties ranged from very susceptible to high tolerance. The objective of this study was to verify the value of a short term screening study compared to a full season field trial. A field study was conducted using twelve (six “0” and six “00”) varieties, selected from the eighty, representing two highly susceptible, two medium susceptible, and two highly tolerant ones. A systemic insecticide treated treatment was planted along with the twelve non-treated treatments for each variety. Statistical design was an RCBD. Plant condition was evaluated using the rating scales used in previous experiments. Yield analysis was also done at the end of the season to measure total yield, pod size, number of pods and number of seeds per pod.
Species 1: Homoptera Aphididae Aphis glycines (soybean aphid)
Keywords: host plant resistance
Back to Student Competition Display Presentations, Section F. Crop Protection Entomology
Back to Student Competition Posters
Back to The 2003 ESA Annual Meeting and Exhibition