Rhododendrons and azaleas are closely related plants and have certain cultural requirements which must be met to insure their successful growth. The following information is provided to help the amateur gardener with the culture of these plants.
Published August 1962. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Rhododendrons and azaleas are closely related plants with certain cultural requirements that must be met to ensure their successful growth. The following information is provided to help the amateur gardener with the culture of these plants.
The leaching of water soluble phenolic compounds from
cold stressed Rhododendron leaves was found to be a reliable
indicator of tissue damage. In sublethally stressed leaf
tissues, more and novel phenolic compounds appeared and were
hypothesized to be precursors of cell wall components such
as lignin and suberin. Subsequent radiolabeling...
Azalea lace bug is an emerging pest in Oregon that can be quite damaging to azaleas and rhododendrons, very popular plants in Oregon nurseries and landscapes. This publication offers information on identification, timing, and management options for this new pest.
Published December 1975. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
The azalea lace bug (Stephanitis pyrioides Scott) is a recently detected invasive pest to the Pacific Northwest and has become a major concern in Oregon. It feeds on azaleas as well as rhododendrons causing stippling on the top side of leaves. The damage is aesthetically displeasing and affects plant vigor...