Division of Agricultural Chemicals, Indian Agricultural Research Institute, New Delhi-110 012
Online published on 15 October, 2011.
A series of esters of dihydrocarveol, a major constituent of essential oil of Piper longum, has been synthesized following reaction of dihydrocarveol with corresponding acid chlorides. They were characterized by IR and 1H-NMR spectral analysis and tested in vitro for their fungicidal activity against three phytopathogenic fungi Sclerotium rolfsii, Pythium debaryanum and Alternaria aiternata. The maximum activity was exhibited by propyl ester against P. debaryanum (ED50 79 ppm) indicating that a carbon chain length of four is optimum for the activity enhancement.
Dihydrocarveol, Piper longum, fungicidal, Sclerotium rolfsii, Pythium debaryanum and Alternaria altemata
