Effects of air pollutants on Los Angeles Basin citrus
Commercially producing lemon and navel orange trees were enclosed in plastic covered greenhouses and were given various fractions of the air pollutants occurring in the Los Angeles Basin. In some treatments nitric oxide was supplied to the trees to react with ozone but this formed nitrogen dioxide, another phytotoxicant. The study showed that the photochemical smog complex reduced the rate of water, apparent photosynthesis and yield of both lemons and navel oranges. Fluoride levels in the atmosphere were too low to cause detectable effects. Leaf drop was significantly less in lemons receiving carbon filtered air than those receiving ''ambient air''. A similar trend occurred in navel oranges. Fruit drop is a serious problem in navel oranges. This loss was significantly less in carbon filtered air than ambient. Yield of mature fruit is reduced in some cases by as much as 50 percent.
- OSTI ID:
- 6214724
- Journal Information:
- Calif. Citrogr.; (United States), Journal Name: Calif. Citrogr.; (United States) Vol. 55:5; ISSN CALCA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
560303* -- Chemicals Metabolism & Toxicology-- Plants-- (-1987)
60 APPLIED LIFE SCIENCES
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
AIR POLLUTION
BIOLOGICAL EFFECTS
CALIFORNIA
CHALCOGENIDES
CITRUS
COMPARATIVE EVALUATIONS
FEDERAL REGION IX
FLUORIDES
FLUORINE COMPOUNDS
FRUIT TREES
HALIDES
HALOGEN COMPOUNDS
INJURIES
LOS ANGELES
NITROGEN COMPOUNDS
NITROGEN OXIDES
NORTH AMERICA
OXIDES
OXYGEN COMPOUNDS
OZONE
PLANTS
POLLUTION
SMOG
TREES
USA