Total phenolic content of Asian elm leaves and host plant suitability for gypsy moth.
The total phenolic content of foliage from 11 elm species and 2 cultivars was measured, and the relationship to gypsy moth developmental studies was determined. The 13 elms, Ulmus wilsoniana (Schneid.), U. japonica (Rehd.), U. glaucesens (Franch), 'Accolade', 'Triumph', U. davidiana (Planch), U. parvifolia (Jacq.), U. szechuanica (Fang), U. macrocarpa (Hance), U. chenmoui (Cheng), U. lamellosa (C. Wang et S.L. Chang, ex L.K. Fu), U. castaneifolia (Hemsl.), and U. gaussenii (Cheng), were grown at the Morton Arboretum, Lisle, IL and analyzed at the Pesticide Toxicology Laboratory, Iowa State University, Ames, IA. Significant differences were found in the phenolic content of the 13 elms surveyed. No significant differences were identified between gypsy moth larval longevity, pupal fresh weight, or percentage adult emergence with respect to total leaf phenolic content.