Flower bud influence on rootability of Rhododendron shoots was
assayed by rooting leaf-petiole cuttings. Monthly samples of an easy-and
an intermediate-to-root cultivar showed periods of poor rooting
in the latter during flower development, although both rooted similarly
during bud dormancy. The decrease in rooting-potential following
flower initiation and development was...
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.
Phytophthora root rot decreases availability and quality of rhododendrons produced in the USA. Symptoms of Phytophthora root rot include root necrosis, leaf chlorosis, stunting, and permanent wilt. The purpose of this thesis was to better understand the impact of root damage, soil moisture, nitrogen fertilizer application, and pathogen species on...
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...
Rhododendron species are host to many Phytophthora species and are an important crop in the nursery industry. The foliar epidemiology of twelve Phytophthora diseases on Rhododendron was studied in field and growth chamber experiments on two Rhododendron cultivars. The relative aggressiveness of Phytophthora spp. was assessed using disease incidence, severity,...