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Fungicidal activity and chemical constitution: XIII. * Active components of commercial formulations containing dinocap
Author(s) -
BYRDE R. J. W.,
CLIFFORD D. R.,
WOODCOCK D.
Publication year - 1966
Publication title -
annals of applied biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 80
eISSN - 1744-7348
pISSN - 0003-4746
DOI - 10.1111/j.1744-7348.1966.tb03817.x
Subject(s) - biology , powdery mildew , phenols , phenol , fungicide , hydrolysis , botany , organic chemistry , biochemistry , chemistry
SUMMARY Six isomers, isolated from the mixture of dinitrophenols obtained by the hydrolysis of commercial formulations containing dinocap, were tested in the greenhouse against apple mildew caused by Podosphaera leucotricha. The two most active compounds were 4‐(Ié‐ethylhexyl)‐ and 4‐(Ié‐propylpentyl)‐2,6‐dinitrophenols, which appear to account for most of the antimildew activity of the mixture. The crotonate of the latter phenol was considerably more effective than dinocap itself, but both crotonates were less effective than the corresponding free phenols. Little evidence of synergism between two ethylhexyldinitrophenols was obtained.