Inhibitory effect of cinnamon, clove, lemongrass, oregano and palmarose essential oils on growth and fumonisin B1 production by Fusarium proliferatum in maize grain
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Abstract
The effect of cinnamon, clove, oregano, palmarose and lemongrass oils on growth and
FB1 production by three different isolates of F. proliferatum in irradiated maize
grain at 0.995 and 0.950 aw and at 20 and 30 degrees C was evaluated. The five essential
oils inhibited growth of F. proliferatum isolates at 0.995 aw at both temperatures,
while at 0.950 aw only cinnamon, clove and oregano oils were effective in inhibiting
growth of F. proliferatum at 20 degrees C and none of them at 30 degrees C. Cinnamon,
oregano and palmarose oils had significant inhibitory effect on FB1 production by
the three strains of F. proliferatum at 0.995 aw and both temperatures, while clove
and lemongrass oils had only significant inhibitory effect at 30 degrees C. No differences
were found using 500 or 1000 microg essential oil g(-1). At 0.950 aw, none of the
essential oils had any significant effect on FB1 production. The results suggest that
mainly cinnamon and oregano oils could be effective in controlling growth and FB1
production by F. proliferatum in maize under preharvest conditions.