## 3 Results
### Biocontrol Assay on Strawberries and Grapes  
The assays realized on strawberry fruits show that the four strains significantly avoided the loss of firmness caused by _Botrytis cinerea_ and _Alternaria alternata_. When the fruits were infected by _Fusarium brachybibosum_, the strains UM270 and CR71 maintained firmness by 87% and 94%, respectively, compared with the control. In addition, the disease incidence due to the three phytopathogens was reduced significantly when each of the bacterial strains was inoculated on the fruits; strain UM270 reduced the disease incidence of _Fusarium brachybibosum_, _Botrytis cinerea_, and _Alternaria alternata_ by 60%, 55%, and 65%, respectively.  
On grapes, the four bacterial strains helped to maintain firmness when they were infected by the studied phytopathogens. When grapes were infected with _Fusarium brachybibosum_, strain UM270 reduced the disease incidence by 47%, strain E25 reduced the disease incidence by 40%, and CR71 reduced the disease incidence by 53%. When the fruits were infected with _Botrytis cinerea_ and _Alternaria alternata_, the four strains reduced the disease incidence significantly compared with the control (Figure 1).  
\begin{table}
\begin{tabular}{c c c c c} \hline \multicolumn{5}{c}{**Inhibition by Volatile Compounds of Bacterial Strains (\%)**} \\ \hline \multirow{2}{*}{**Fungal Species/Strain**} & \multicolumn{2}{c}{_Bacillus toyonensis_} & \multirow{2}{*}{_Bacillus_ sp. E25**} & \multirow{2}{*}{_B. **thuringiensis_} & \multirow{2}{*}{_Pseudomonas_} \\  & **COPE52** & & & **CR71** & _fluorescens_ **UM270** \\ \hline _Alternaria alternata_ 1A & 6.4 \(\pm\) 6.9 ab & 8.4 \(\pm\) 8.7 ab & 7.3 \(\pm\) 6.4 ab & 17.4 \(\pm\) 8.1 b \\ \hline _Alternaria alternata_ 2Z & - & - & - & - \\ \hline _Alternaria alternata_ 4A & 13.6 \(\pm\) 14.9 a & 11.3 \(\pm\) 3.6 a & 22.0 \(\pm\) 12.9 a & 27.8 \(\pm\) 28.0 a \\ \hline _Alternaria alternata_ 6A & - & - & - & 5.4 \(\pm\) 2.1 b \\ \hline _Alternaria_ sp. 3A & 0.5 \(\pm\) 5.2 a & 2.4 \(\pm\) 6.2 a & 4.1 \(\pm\) 2.1 a & 4.3 \(\pm\) 5.9 a \\ \hline _Botryosphaeria rhodina_ 5A & 3.5 \(\pm\) 6.1 a & 1.2 \(\pm\) 9.5 a & 2.8 \(\pm\) 1.3 a & 6.1 \(\pm\) 11.6 a \\ \hline _Botrytis cinerea_ 62 BCV & 8.7 \(\pm\) 6.7 a & 14.5 \(\pm\) 17.2 a & 19.7 \(\pm\) 14.1 a & 4.1 \(\pm\) 3.5 a \\ \hline _Botrytis_ sp. 62C & 33.1 \(\pm\) 35.6 a & 36.4 \(\pm\) 27.2 a & 15.5 \(\pm\) 46.5 a & 44.6 \(\pm\) 37.8 a \\ \hline _Cladosporium_ sp. 1 BOA & - & 1.3 \(\pm\) 15.0 a & 5.8 \(\pm\) 5.7 a & - \\ \hline _Fusarium brachybibosum_ 4 BF & - & 2.3 \(\pm\) 2.5 a & 1.7 \(\pm\) 6.7 a & - \\ \hline _Fusarium brachybibosum_ HBF & - & - & - & - \\ \hline _Geotrichum candidium_ FRB & 0.4 \(\pm\) 2.3 a & 2.8 \(\pm\) 6.9 a & - & 5.8 \(\pm\) 7.5 a \\ \hline _Geotrichum plurtureensis_ 7Z & 4.3 \(\pm\) 16.2 a & 5.7 \(\pm\) 19.2 a & 3.4 \(\pm\) 20.3 a & - \\ \hline _Mucor circinelloides_ 1 BF & - & - & - & - \\ \hline _Mucor fragilis_ 22 & - & - & - & - \\ \hline _Mucor fragilis_ FRA & 12.4 \(\pm\) 14.4 a & 5.8 \(\pm\) 10.6 a & 9.6 \(\pm\) 8.3 a & - \\ \hline _Penicillium crustosum_ 1F & - & 2.4 \(\pm\) 36.8 a & - & 6.5 \(\pm\) 38.8 a \\ \hline _Penicillium expansum_ 230 & - & - & - & - \\ \hline _Penicillium expansum_ 5F & - & - & - & - \\ \hline \end{tabular} \(\pm\)SD values. Letters indicate that the means differed significantly after [PERSON]’s multiple range test (\(p<0.05\)).  
\end{table}
Table 2: Inhibition percentages of postharvest fungal pathogens by employing divided Petri plate assays (VOCs emission).