Evaluation location: Maine, United States
Study Name: Resistance to Potato Leaf Roll Virus Experiment Type: Field FIELD Study Year: 1984 Year started: 05/01/1984 Year ended: 02/14/1985. Each plant was inoculated with five infected green peach aphids. Plants with visual symptoms were labeled susceptible, and plants which showed no visual symptoms were given two ELISA tests. One ELISA test was made on the plants in the field, the other plants were tested after being re-rooted in the greenhouse.