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Injury to Eastern White Pine by Sulfurdioxide and Ozone Alone and in Mixtures
Author(s) -
Costonis A. C.
Publication year - 1973
Publication title -
european journal of forest pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.535
H-Index - 49
eISSN - 1439-0329
pISSN - 0300-1237
DOI - 10.1111/j.1439-0329.1973.tb00375.x
Subject(s) - fumigation , ozone , sulfur dioxide , sulfur , horticulture , toxicology , biology , botany , pinus <genus> , environmental chemistry , zoology , chemistry , ecology , organic chemistry
Clones of eastera white pine ( Pinus strobus ) selected for their sensitivity to sulfur dioxide (SO 2 ) were fumigated in a controlled environment chamber. Sulfur dioxide alone and in combination with ozone (O 3 ) at concentration 5 parts per hundred million (pphm) of air by volume of each gas for independent 2‐hr exposures was toxic to new needles. Severest injury resulted from a discontinuous fumigation with 5 pphm O 3 and 5 pphm SO 2 for 2 hr in separate fumigations, followed 24 hr later by a 2‐hr exposure to a mixture of these gases, each at 5 pphm. The rapidity of lesion development and total injury to new needles were less following a single 2‐hr fumigation with an O 3 ‐SO 2 mixture than when a single 2‐hr fumigation with SO 2 alone was used. Ozone and SO 2 reacted to reduce injury. These plants were not injured by O 3 used alone. New needles receiving only filtered air or new needles on resistant plants were not visibly affected by any treatment. Acute injury induced by the O 3 ‐SO 2 mixture developed differently from injury induced by SO 2 alone.