AbstractTwenty‐two substituted 2‐ and 4‐cyclohexylphenols were synthesised and tested in the glasshouse against the powdery mildews of apple and marrow. Relative differences in fungicidal activity between the two series are discussed in relation to structural variations. High activity is associated with a nitro group in position 4 together with either a halogen or nitro‐group in pos
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