Evaluation location: Minnesota, United States
Study Name: Resistance to leaf hopper, flea beetle, peach aphid, tarnish Experiment Type: Field FIELD Study Year: 1985 Year started: 04/01/1986 Year ended: 05/01/1987. Seeds were germinated and a plot of six plants were transplanted in the field in 12 row blocks. Each block was bordered by an eight meter strip of alfalfa which was planted to attract and retain the pests. Bug samples were taken four times during the summer growing period by the use of vacuum sampling. These samples were frozen and evaluated during the winter months by identifying and tallying each pest in the sample. A total count was determined from the four samples for potato leaf hopper adults and nymphs (P1, P2), tarnish beetle adults and nymphs (P3, P4), potato aphid adults (P5), and potato flea beetle adults (P6). The natural log of the total count was then found.