Specific chemical compounds present in Rhododendron leaves stimulate adult root weevil feeding. The resistance of certain Rhododendron species to weevil feeding is due to the presence of volatile terpene constituents of the leaves.

Sciopithes obscurus Horn, Otiorhynchus sulcatus Fab., black vine weevil, phagostimulant, feeding deterrent, insect repellent, phytosterols, flavonol glycosides, sugars, essential oils
This content is only available as a PDF.

Author notes

The research discussed herein was supported, in part, by the nursery industry through contributions to the Horticultural Research Institute. Thanks are due the Rhododendron Species Foundation, Federal Way, Washington, for providing plant material, and to Kathy Sain for preparing some of the figures.

2Plant Physiologist.

Copyright, All Rights Reserved
1983