Influence of ozone on selected woody ornamentals
Journal Article
·
· Phytopathology; (United States)
OSTI ID:6384776
Approximately 900 plants of 24 woody ornamental species were exposed to 25 pphm ozone for 8 hr at 24 C, 75% relative humidity, and 1400 ft-c of light. Cercis canadensis, Cotoneaster divaricata, C. horizontalis, Forsythia intermedia spectabilis Lynwood Gold, Gleditsia triacanthos inermis, Rhododendron kaempheri Camp fire, R. kurume Snow, R. catawbiense album, R. nova zembla, R. roseium elegans, Sorbus aucuparia, Syringa vulgaris, and Viburnum carlesi were sensitive. The most common symptoms were brown to black necrotic stipples on the upper leaf surface and premature defoliation. Interveinal necrotic and chlorotic flecks occurred infrequently. Current leaves of intermediate age were most sensitive. Euonymous alatus compacta, Hedra helix, Juniperus communis depressa plumosa, Pachysandra terminalis, Pieris japonica, Pyracantha coccinea lalandi, Rhododendron caroliniana, R. mollis, Taxus cuspidata, T. media hicksi, and Vinca minor were resistant.
- Research Organization:
- Pennsylvania State Univ., University Park
- OSTI ID:
- 6384776
- Journal Information:
- Phytopathology; (United States), Journal Name: Phytopathology; (United States) Vol. 61:2; ISSN PHYTA
- Country of Publication:
- United States
- Language:
- English
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