Wednesday, 17 November 2004

Diversity and abundance of leafhopper species among red maple clonal selections

Jo-Ann Bentz, and Alden M. Townsend, US Department of Agriculture, Agricultural Research Service, 10300 Baltimore Avenue, BARC-West, Bldg. 010A, Rm. 238, Beltsville, MD

A survey was conducted in the 2001 growing season to examine the leafhopper diversity and abundance among trees of 24 red maple (Acer rubrum) clonal selections in a mixed stand. Yellow sticky traps were used to qualify and quantify the number of aerial leafhoppers from 1 May until 4 September 2001. A total of 45 species from eight different leafhopper subfamilies, for a total of 6,055 individuals, were considered in this study. The mean number of leafhoppers collected, mean species richness, diversity and evenness were significantly lower for ‘October Glory' than for the other selections. Yet, none of the species dominated the weekly samples. Species similarity among selections ranged from 56% to 90%. No two selections had complete similarity. ‘Franksred' and trees of a controlled cross between ‘October Glory' × ‘Autumn Flame' shared the highest degree of species similarity, while selections from PA, USA and RI, USA were the least similar.

Species 1: Homoptera Cicadellidae Empoasca fabae (potato leafhopper)
Species 2: Homoptera Cicadellidae Erythroneura spp
Species 3: Homoptera Cicadellidae Graphocephala versuta
Keywords: species richness, species evenness

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