Abstract
Foliage and floral samples from 45 favored host plants (24 families) of the Japanese beetle, Popillia japonica Newman, were evaluated to determine their influence on the feeding response of the insect under laboratory conditions. Foliage from two plants, the red raspberry, Rubus idaeus L., and the European grape, Vitis vinifera L., and rose petals, Rosa sp., induced greater feeding than did sassafras, Sassafras albidum (Nutt.) Nees, the foliage of which was used as a comparison standard. Foliage from 25 other plants, silks from corn, Zea mays L., and blossoms of Rose-of-Sharon, Hibiscus syriacus L., induced feeding comparable to that of the sassafras standard. Leaves from several plants reported to be heavily attacked, however, including sweet pepperbush, Clethra alnifolia L., rhubarb, Rheum rhabarbarum L., black cherry, Prunus serotina J. F. Ehrh., apple, Malus × domestica Borkh. ‘Rome’, peach, Prunus persica (L.) Batsch ‘Elberta’, and asparagus, Asparagus officinalis L., were fed upon significantly less than sassafras.
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