Potato leafhopper populations were sampled from two different glandular-haired, leafhopper-resistant alfalfa cultivars in field-size plots. The different cultivars were planted in subsequent years in separate locations. Each resistant cultivar had a corresponding susceptible cultivar for comparison. Insecticide treated plots were also included in the study. Both locations were sampled for a three year period. During times of moderate to large leafhopper population densities, the resistant cultivars were able to lower leafhopper populations. These reductions were observed with both adults and nymphs. However, especially during the establishment year, populations on the glandular-haired alfalfa still caused economic damage. The highest yields were usually obtained with the susceptible cultivar having an insecticide application.
Species 1: Homoptera Cicadellidae Empoasca fabae (potato leafhopper)
Keywords: plant resistance
The ESA 2001 Annual Meeting - 2001: An Entomological Odyssey of ESA