Fungicidal Properties of Some New Copolymer Resins Derived from 2,4- Dihydroxyphenylethyl Ketone and 2,4-Dihydroxyphenylbenzyl Ketone

Abstract

Fungicidal properties of some new copolymer resins, synthesized by condensing 2,4- dihydroxyphenyl ethyl ketone/2,4-dihydroxy phenyl benzyl ketone with substituted benzoic acids and formaldehyde or furfural in the presence of acid or base catalyst was assayed against Dreschlera halodes and Fusarium oxysporum causing post-harvest disease of tomatoes. The homo and copolymer resins have been characterized by spectral analysis, solubility characteristics and thermal analysis. All homo resins were devoid of antifungal activity, while some copolymer resins (obtained with comonomer) were toxic at one or the other concentration. Within the copolymer resins, furfural based resins were highly active against both the fungi and caused total germination inhibition at 640 μg/mL under investigation. Both the pathogens were equally sensitive to the copolymer resins.