The accuracy, precision and efficiency of stem-count and sweep-net techniques were compared for sampling the pea aphid, Acyrthosiphon pisum (Harris), in alfalfa. Density estimates by both techniques were highly correlated (r = 0.87). Both techniques were similar in sample precision and efficiency, but stem counts provided more accurate density estimates than the sweep net technique. The stem count technique is an accurate and efficient alternative to the sweep net for sampling pea aphids in alfalfa.
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Author notes
1 Department of Entomology, University of Georgia, Coastal Plain Experiment Station, Tifton, Georgia 31793.
© 1989 Georgia Entomological Society, Inc.
1989