Ozone curbs crown rust

Journal Article · Thu Jan 01 04:00:00 EST 1970 · Agric. Res.; (United States)

OSTI ID:6296614

Crown rust, the most destructive disease of oats, was suppressed in laboratory fumigation chambers by ozone air pollution levels commonly surpassed in many areas. Whether the effects of air pollution on crown rust are of economic importance under field conditions is yet to be determined. Crown rust, caused by the fungus Puccinia coronata, is particularly destructive in Southern and North Central States, often reducing yields 20 percent or more. Rust pustules on oats were significantly smaller when plants were exposed to 10 parts per hundred million ozone for 6 hours in the light on the 10 days after infection. About half as many rust spores were produced in the ozone chamber as in one protected by carbon filters. Exposure to 10 pphm ozone did not affect viability of spores. Spores produced on exposed plants germinated and penetrated stomates of oat leaves as well as spores produced on unexposed leaves.

• OSTI ID: 6296614
• Journal Information: Agric. Res.; (United States), Journal Name: Agric. Res.; (United States) Vol. 18:8; ISSN AGREA
• 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.
BIOLOGICAL EFFECTS
CEREALS
DISEASES
DOSE-RESPONSE RELATIONSHIPS
FUNGAL DISEASES
GRASS
INFECTIOUS DISEASES
INHIBITION
OATS
OZONE
PLANTS
SPORES