Needle scorch and condition of ponderosa pine trees in the Dalles area
The findings of a survey of pine trees in The Dalles area of Oregon, May 31-June 1, 1961, were as follows: (1) considerable injury from blight, or needle scorch, was found. (2) There was no pathological, entomological, or soil condition that would account for the scorch of pine tree needles. (3) Scorched needles contained considerably more fluorine than unscorched needles and were typical of ponderosa pine blight. (4) No scorch was found in samples outside the Dalles area, and these samples were low in fluorine content. The percentage of scorch varied from 0.9% at a station 4 miles south of an aluminum factory to 67.7% at a station 1.2 miles WNW of the factory. 8 references, 1 figure, 1 table.
- OSTI ID:
- 6425839
- 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.
AIR POLLUTION
CONIFERS
DATA
ECOLOGICAL CONCENTRATION
ENVIRONMENTAL TRANSPORT
EXPERIMENTAL DATA
FEDERAL REGION X
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
INDUSTRIAL PLANTS
INFORMATION
INJURIES
LEAVES
MASS TRANSFER
NORTH AMERICA
NUMERICAL DATA
OREGON
PINES
PLANTS
POLLUTION
POLLUTION SOURCES
TOXICITY
TREES
USA