Propyl isothiocyanate has been tested as fumigant against the larvae of a caribbean fruit fly Anastrepha suspense.Propyl isothiocyanate has been employed as internal standard in the analysis of low-volatility sulphur compounds in wines using solid-phase microextraction and GC. Propyl isothiocyanate has been tested as fumigant against the larvae of a caribbean fruit fly Anastrepha suspense. Propyl isothiocyanate has been employed as internal standard in the analysis of low-volatility sulphur compounds in wines using solid-phase microextraction and GC.