Fungicidal activity of volatiles from selected cruciferous plants against resting propagules of soil-borne fungal pathogens

The efficacy of volatiles evolved from tissues of nine cruciferous plants a gainst resting propagules of Fusarium oxysporum var radicis f, sp, lycopers ici, Sclerotium cepivorum, and Sclerotinia sclerotiorum was tested. The cru ciferous plants released biocidal compounds, mainly isothiocyanates, produc ed during the enzymatic degradation of glucosinolates present in the plant cells. Among the plants investigated, the highest fungicidal activity and a lso the highest concentration of isothiocyanates were found in Brassica jun cea. The resting propagules of tested fungi differed significantly in their sensitivity towards volatiles released from plant tissues.