Fungicidal activity and chemical constitution. Part XXI: The activity of substituted 1, 4-naphthoquinones and quinoline-5, 8-diones against apple powdery mildew |
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Authors: | Carolyn S. James R. S. Thomas Loeffler David Woodcock |
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Abstract: | Several series of alkyl-substituted amino-, bromo-, chloro-, fluoro- and hydroxy-1, 4-naphthoquinones, as well as some 6-alkylaminoquinoline-5, 8-diones and 7-alkyl-6-hydroxyquinoline-5, 8-diones were prepared and tested as protectant fungicides against apple powdery mildew (caused by Podosphaera leucotricha). While most of the compounds did not reduce infection when applied at 10?3M, several 3-alkyl-2-bromo-and 3-alkyl-2-chloro-1, naphthoquinones were found to have ED50 values below 50 × 10?5M. |
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