Effects of growth retardants and fumigations with ozone and sulfur dioxide on growth and flowering of Euphorbia pulcherrima Willd

Journal Article · Mon Jan 01 04:00:00 EST 1973 · J. Am. Soc. Hortic. Sci.; (United States)

OSTI ID:5003106

Cathey, H M; Heggestad, H E

Eight cultivars of poinsettia, Euphorbia pulcherrima Willd., were evaluated for sensitivity to ..cap alpha..-cyclopropyl-..cap alpha.. (4-methoxyphenyl)-5-pyrimidine methanol (ancymidol) and protection from ozone and sulfur dioxide injury afforded by applications of ancymidol and (2-chloroethyl) trimethyl ammonium chloride (chlormequat). Foliar sprays of ancymidol were at least 80 to 500 times and the soil drench 1000 times more active than chlormequat in retarding stem elongation. The diam of the bracts was reduced, but branching increased more on plants treated with ancymidol than on untreated plants. The cv. Annette Hegg (AH) was more sensitive to ozone fumigations than was Eckespoint C-1' (C-1). Sulfur dioxide also caused more injury to AH than to C-1. Ancymidol and chlormequat reduced visible injury induced by ozone and sulfur dioxide.

• Research Organization: Dept. of Agriculture, Beltsville, MD
• OSTI ID: 5003106
• Journal Information: J. Am. Soc. Hortic. Sci.; (United States), Journal Name: J. Am. Soc. Hortic. Sci.; (United States) Vol. 98:1; ISSN JOSHB
• Country of Publication: United States
• Language: English

Related Subjects

500200 -- Environment
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
BIOLOGICAL EFFECTS
CHALCOGENIDES
COMPARATIVE EVALUATIONS
DATA
EXPERIMENTAL DATA
GROWTH
INFORMATION
INHIBITION
NUMERICAL DATA
ORNAMENTAL PLANTS
OXIDES
OXYGEN COMPOUNDS
OZONE
PLANT GROWTH
PLANT GROWTH REGULATORS
PLANTS
POLLUTION
SENSITIVITY
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
TOXICITY