Selected elm, Ulmus spp., and their hybrids growing at The Morton Arboretum, Lisle, IL, were evaluated in bioassays for feeding preference by the Japanese beetle, Popillia japonica Newman. No-choice bioassays revealed that the hybrids U. ‘Morton’-Accolade (U. japonica x U. wilsoniana), U. elongata,U. laciniata,U. lamellosa,U. macrocarpa,U. parvifolia,U. ‘Morton Plainsman’-Vanguard (U. japonica x U. pumila) x U. davidiana, and U. Morton Plainsman-Vanguard (U. japonica x U. pumila) x U. japonica-wilsoniana-pumila had low (<31%) amounts of leaf tissue consumed. The hybrids U. davidiana x U. japonica,U. davidiana x U. japonica-wilsoniana-pumila, and U. japonica had high (>68%) amounts of leaf tissue consumed. Rankings for the dried fecal pellet weights, field defoliation survey, and multiple-choice studies were consistent with the no-choice studies for these same elm genotypes. Leaf pubescence on U. glaucescens, U. lamellosa, and U. macrocarpa seems to be a feeding deterrent for the adult beetle as evidenced by low levels of feeding damage (<26%) in the laboratory studies, low dried fecal pellet weights (<24 mg), and field defoliation ratings no to very light feeding (<0.6). The genotypes of U. Morton-Accolade (U. japonica x U. wilsoniana),U. elongata,U. laciniata,U. lamellosa,U. macrocarpa,U. parvifolia,U. Morton Plainsman-Vanguard (U. japonica x U. pumila) x U. davidiana, and U. Morton Plainsman-Vanguard (U. japonica x U. pumila) x U. japonica-wilsoniana-pumila show promise for use for future elm breeding programs.
Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.