Ozone needle mottle of pine in Southern California

Journal Article · Thu Feb 01 04:00:00 EST 1968 · J. Air Pollut. Control Assoc.; (United States)

DOI:https://doi.org/10.1080/00022470.1968.10469097· OSTI ID:5928317

Richards, Sr, B L; Taylor, O C; Edmunds, Jr, G F

The specific type of chlorotic mottling in ponderosa pine needles, as reported by various workers, justifies the assumption that X-disease, needle dieback, chlorotic decline, and ozone needle mottle in various pine species described in this paper are one and the same disease. Experimental production of chlorotic needle mottling in ponderosa pine (Pinus ponderosa Laws) with ozone-polluted ambient air and with synthesized ozone by Miller further justifies this basic assumption. Controlled fumigation studies (1959 and 1960 at the Citrus Research and Agricultural Experiment Station, Riverside California) confirm needle mottle of pine as a distinctive physiogenic disease, and atmospheric ozone as the prime etiological factor. Basic experimental research together with the wide range of field studies and observations by the present authors, have clarified the type and sequence in symptom expression essential for diagnosis, and have greatly extended the range of pine species visibly susceptible to atmospheric ozone. Additional emphasis is placed on significance both of the ozone needle mottle problem and of ozone as an economic factor in forestry. 15 references, 4 figures.

• Research Organization: Univ. of California, Riverside
• OSTI ID: 5928317
• Journal Information: J. Air Pollut. Control Assoc.; (United States), Journal Name: J. Air Pollut. Control Assoc.; (United States) Vol. 18:2; ISSN JPCAA
• Country of Publication: United States
• Language: English

Related Subjects

560303* -- Chemicals Metabolism & Toxicology-- Plants-- (-1987)
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
AIR POLLUTION
BIOLOGICAL EFFECTS
CONIFERS
ECONOMIC ANALYSIS
ECONOMICS
INJURIES
LEAVES
OZONE
PINES
PLANT DISEASES
PLANTS
POLLUTION
SYMPTOMS
TREES