Fungicide effect of volatile organic compounds on in vitro Fusarium verticillioides growth

BRITO V.; PIZZOLITTO R. P.; JACQUAT A; ACHIMÓN F; ZYGADLO J.A.

La Falda

Jornada; XXI Jornadas Científicas de la Sociedad de Biología de Córdoba; 2017

Sociedad de Biología de Córdoba

While new technologies have led to a significant increase ingrain production, pests attack reduces the production, leading tofood and economic losses. Nowadays, the emphasis is onstudying alternatives to grain conservation, such as the use ofbiopesticides, organic compounds derived from natural sources,considered as a green technology of minimum risk. The aim ofthis study was to evaluate the antifungal capacity of volatileorganic compounds (VOCs) against a corn grain pest fungus:Fusarium verticillioides. For this purpose, fumigant toxicitytests were carried out in vitro employing: isovaleraldehyde,isobutyraldehyde, cis-2- hexenol, cis-3- hexenol and nerol. Eightconcentrations were tested between 4.24 and 0.033 μM.Although, all the compounds used showed an effect on F.verticillioides growth, at the tested doses the nerol andisovaleraldehyde were the most active compounds, resulting in atotal inhibition of mycelial growth at a minimum concentrationof 0.27 μM and 0.31 μM, respectively. The minimum inhibitoryconcentration for the other compounds was found to be higherthan for nerol and isovaleraldehyde, thus, 1.42 μM for cis-2-hexenol, 4.66 μM for isobutyraldehyde and 16.27 μM for cis-3-hexenol. The use of biocompounds has advantages over otherpesticides, because they present a reduced toxicity in mammalsand restricted persistence in the environment. Thus, nerol andisovaleraldehyde could constitute an alternative tool for theprotection of the stored corn kernels.