1 research outputs found
Effectiveness of the influence of selected essential oils on the growth of parasitic fusarium isolated from wheat kernels from central Europe
The aim of the study was to determine the effectiveness of selected seven commercial
essential oils (EsO) (grapefruit, lemongrass, tea tree (TTO), thyme, verbena, cajeput, and Litsea cubeba)
on isolates of common Central European parasitic fungal species of Fusarium obtained from infected
wheat kernels, and to evaluate the oils as potential natural fungicides. The study was conducted in
2 stages. At each stage, the fungicidal activity of EsO (with concentrations of 0.025; 0.05; 0.125; 0.25;
0.50; 1.0, and 2.0%) against Fusarium spp. was evaluated using the disc plate method and zones of
growth inhibition were measured. At the first stage, the fungistatic activity of EsO was evaluated
against four species of Fusarium from the Polish population (F. avenaceum FAPL, F. culmorum FCPL,
F. graminearum FGPL and F. oxysporum FOPL). The correlation coefficient between the mycelial growth
rate index (T) and the fungistatic activity (FA) was calculated. At the second stage, on the basis of the
mycelium growth rate index, the effectiveness of the EsO in limiting the development of Fusarium
isolates from the German population (F. culmorum FC1D, F. culmorum FC2D, F. graminearum FG1D,
F. graminearum FG2D and F. poae FP0D) was assessed. The first and second stage results presented
as a growth rate index were then used to indicate essential oils (as potential natural fungicides)
effectively limiting the development of various common Central European parasitic species Fusarium
spp. Finally, the sensitivity of four Fusarium isolates from the Polish population and five Fusarium
isolates from the German population was compared. The data were compiled in STATISTICA
13.0 (StatSoft, Inc, CA, USA) at the significance level of 0.05. Fusarium isolates from the German
population were generally more sensitive than those from the Polish population. The sensitivity of
individual Fusarium species varied. Their vulnerability, regardless of the isolate origin, in order from
the most to the least sensitive, is as follows: F. culmorum, F. graminearum, F. poae, F. avenaceum and
F. oxysporum. The strongest fungicidal activity, similar to Funaben T, showed thyme oil (regardless
of the concentration). Performance of citral oils (lemongrass and Litsea cubeba) was similar but at a
concentration above 0.025%