Bio-fumigation Potential- Ida Gold Mustard and Pacific Gold Mustard have very high levels of glucosinolates. The interest in glucosinolates, which are allelochemicals that occur throughout the Brassica family, has been generated because of the possibility of using plant tissues as a substitute for or supplement to synthetic chemical pest controls. Glucosinolate degradation produces biologically active products, the most significant of which (for potential biofumigation) are isothiocyanates, which behave as general biocides and have broad-spectrum activity on soil microorganisms. Some commercial soil fumigants use Methyl Isothiocyanate as the chief fumigant or as the active pesticidal agent produced from the degradation of other constituents.