Bean powdery mildew compounds

Table I. Control of Bean Powdery Mildew (BPM) by a,a-Diphenylmethaneheterocyclic Compounds Applied at 400 ppm...

Another parameter investigated was the usefulness of different substituents other than hydrogen or hydroxyl on the Of-carbon. Table II provides the relative activity of several diphenylmethyl substituted 5-pyrimidines. Clearly, the hydroxyl substituted compound is the most active against bean powdery mildew. 

V an Gestel etal. 980) prepared a series of substituted 1 -(2-phenyI-1,3-dioxolan-2-yl-methyl)-1,2,4-triazoles (60), ana evaluated them in the greenhouse for fungicidal activity. Compounds with 2,4-dichloro substitution on the phenyl ring and with a lower alkyl side chain on the dioxolane ring were found most promising for the control of powdery mildew on gherkins and barley, and for the control of bean rust. 

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