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Wetting ability of cationic surface‐active agents and their control of oat powdery mildew
Author(s) -
Somers E.,
Pring R. J.,
Byrde R. J. W.
Publication year - 1967
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.2740180405
Subject(s) - powdery mildew , wetting , fungicide , cationic polymerization , chemistry , conidium , materials science , biology , botany , organic chemistry , composite material
Twelve cationic surface‐active agents, quaternary ammonium and pyridinium salts, of widely different wetting ability were tested as eradicant fungicides against Erysiphe graminis on oats, at both equal wetting power and equal concentration. At equal wetting power there were wide differences in fungitoxicity but, in general, the compounds with the greatest wetting ability were the most effective fungicides. It is suggested that mechanical injury by wetting of oat powdery mildew is not the only determinant of toxicity but that the ability of these compounds to penetrate the fungal conidia is related to their physico‐chemical structure which determines wetting power.