Effectiveness of road dust as a protective agent on buckwheat and pinto bean against sulfur dioxide and ozone
The effectiveness of road dust as a protective agent in reducing sulfur dioxide injury to buckwheat and ozone injury to pinto bean was investigated. Road dust was obtained from a lightly gravelled earthen road and processed so that the resulting dust closely approximated that found on roadside vegetation. Buckwheat was exposed to SO/sub 2/ concns ranging from 25-75 ..mu..liters/liter (pphm). The pinto beans were exposed to ozone concns ranging from 25-50 ..mu..liters/liter. All exposures were for a 6-h period and the temp and relative humidity were maintained 26 C and 70%, respectively. In both series of exposures, the road dust was applied to only the upper leaf surface at a rate sufficient to cover completely. The SO/sub 2/ exposures resulted in a correlation between severity of injury and dosage on both dusted and undusted buckwheat plants. A significant reduction in symptoms was noted on dusted (as opposed to undusted) plants, particularly at the higher dosages. Ozone exposures revealed a similar significant reduction in symptoms on dusted pinto bean plants when compared to undusted plants.
- Research Organization:
- Ontario Ministry of Environment, Toronto
- OSTI ID:
- 5263180
- Journal Information:
- Phytopathology; (United States), Journal Name: Phytopathology; (United States) Vol. 64:5; ISSN PHYTA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
560303* -- Chemicals Metabolism & Toxicology-- Plants-- (-1987)
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
BIOLOGICAL EFFECTS
BUCKWHEAT
CANADA
CHALCOGENIDES
DATA
DUSTS
EXPERIMENTAL DATA
INFORMATION
LEGUMINOSAE
NORTH AMERICA
NUMERICAL DATA
ONTARIO
OXIDES
OXYGEN COMPOUNDS
OZONE
PHASEOLUS
PLANTS
ROADS
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES