Late-spring leaf scorch of maple and beech trees

Journal Article · Thu Jun 01 04:00:00 EDT 1972 · Plant Dis.; (United States)

OSTI ID:5262880

Linzon, S N; McIlveen, W D; Pearson, R G

Investigation of a number of vegetation injury complaints in early June 1971, in which the complainants suspected air pollutants as the causal agents led to the discovery of a widespread physiological leaf scorch of maple and beech trees in the Niagara peninsula area of Southern Ontario. A description of the symptoms of injury, the species of trees affected and the time of occurrence is provided to aid in the differentiation of this leaf scorch from similar injuries which may be caused by air pollutants, such as fluoride and sulfur dioxide. Weather records and other data showed that the sudden exposure of foliage to full sunlight following a wet cloudy period, coupled with wind factors and the physiological state of maturity of the foliage, were responsible for the scorch injury. Damage was more severe on the southwest sides of affected trees and appeared as water-soaking of the tissues in marginal and intercostal areas of the leaves, followed by drying and necrosis of the foliage. The late-spring leaf scorch injury is distinctly different for the scorch which occurs on maples in mid-summer. The name Late-Spring Leaf Scorch (LSLS) is proposed to distinguish the described damage. 7 references, 3 figures, 1 table.

• Research Organization: Ontario Dept. of the Environment, Toronto
• OSTI ID: 5262880
• Journal Information: Plant Dis.; (United States), Journal Name: Plant Dis.; (United States) Vol. 56:6; ISSN PLDID
• 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
BEECH TREES
CANADA
CHALCOGENIDES
ELECTROMAGNETIC RADIATION
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
INJURIES
LEAVES
MAPLES
NECROSIS
NORTH AMERICA
ONTARIO
OXIDES
OXYGEN COMPOUNDS
PATHOLOGICAL CHANGES
PLANTS
POLLUTION
RADIATIONS
SEASONAL VARIATIONS
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
TOXICITY
TREES
VARIATIONS
VISIBLE RADIATION
WEATHER
WIND