## 3 Results
### Survey of Commonly Used Fungicides in the Corn Fields of Fuxin Region
The control (CK) showed severe infection (disease index 54.22) (Table 5). For stem rot management, Treatment 2 again exhibited outstanding performance with the lowest incidence rate (0.61 \(\pm\) 0.70%) and highest disease inhibition rate (%): \(71.03\pm 71.51\%\), significantly superior to that of other treatments. Notably, Treatment 1 (2.15 \(\pm\) 1.18%) showed comparable efficacy to CK (2.11 \(\pm\) 2.47%), indicating the limited effect of solo difenoconazole application. Treatments 5 (2.34 \(\pm\) 2.47%) and 4 (tetramycin, 2.70 \(\pm\) 1.76%) showed intermediate performance, while Treatments 3 (triadimeon, 4.61 \(\pm\) 6.01%), 6 (3.28 \(\pm\) 2.51%), and 7 (3.97 \(\pm\) 0.64%) demonstrated relatively poor control (Table 6). These findings highlight that the combination of difenoconazole with _Trichoderma_ fermentate achieved synergistic effects for both leaf blight and stem rot control, whereas carbendazim and triadimeon showed limited efficacy under experimental conditions. \begin{table}
\begin{tabular}{c c c c} \hline \hline
**Treatment Number** & **Treatment Combinations** & **Disease Index** & **Disease Inhibition Rate (\%)** \\ \hline
1 & 10\% Difenoconazole & 23.74 \(\pm\) 1.47 *** & 56.21 \(\pm\) 2.73 c \\
2 & 10\% Difenoconazole + Biocontrol agent & 14.96 \(\pm\) 0.28 *** & 72.40 \(\pm\)0.52 a \\
3 & 15\% Triadimeon & 24.70 \(\pm\) 1.91 *** & 54.44 \(\pm\) 3.53 c \\
4 & 0.3\% Tetramycin & 23.94 \(\pm\) 2.51 ** & 55.84 \(\pm\) 4.62 c \\
5 & 250 g/L Azoxystrobin & 16.31 \(\pm\) 1.21 ** & 69.91 \(\pm\) 2.24 b \\
6 & 50\% Carbendazim & 29.22 \(\pm\) 2.86 ** & 46.11 \(\pm\) 5.27 d \\
7 & Biocontrol agent & 17.83 \(\pm\) 0.78 *** & 67.11 \(\pm\) 1.44 b \\
8 & CK & 54.22 \(\pm\) 0.71 & - \\ \hline \hline \end{tabular}
\begin{tabular}{c c c c} \hline \hline
**Treatment Number** & **Treatment Combinations** & **Disease Index** & **Disease Inhibition Rate (\%)** \\ \hline
1 & 10\% Difenoconazole & 23.74 \(\pm\) 1.47 *** & 56.21 \(\pm\) 2.73 c \\
2 & 10\% Difenoconazole + Biocontrol agent & 14.96 \(\pm\) 0.28 *** & 72.40 \(\pm\)0.52 a \\
3 & 15\% Triadimeon & 24.70 \(\pm\) 1.91 *** & 54.44 \(\pm\) 3.53 c \\
4 & 0.3\% Tetramycin & 23.94 \(\pm\) 2.51 ** & 55.84 \(\pm\) 4.62 c \\
5 & 250 g/L Azoxystrobin & 16.31 \(\pm\) 1.21 ** & 69.91 \(\pm\) 2.24 b \\
6 & 50\% Carbendazim & 29.22 \(\pm\) 2.86 ** & 46.11 \(\pm\) 5.27 d \\
7 & Biocontrol agent & 17.83 \(\pm\) 0.78 *** & 67.11 \(\pm\) 1.44 b \\
8 & CK & 54.22 \(\pm\) 0.71 & - \\ \hline \hline \end{tabular}
\begin{tabular}{c c c} \hline \hline
**Treatment Number** & **Treatment Combinations** & **Disease Index** & **Disease Inhibition Rate (\%)** \\ \hline
1 & 10\% Difenoconazole & 23.74 \(\pm\) 1.47 *** & 56.21 \(\pm\) 2.73 c \\
2 & 10\% Difenoconazole + Biocontrol agent & 14.96 \(\pm\) 0.28 *** & 72.40 \(\pm\)0.52 a \\
3 & 15\% Triadimeon & 24.70 \(\pm\) 1.91 *** & 54.44 \(\pm\) 3.53 c \\
4 & 0.3\% Tetramycin & 23.94 \(\pm\) 2.51 ** & 55.84 \(\pm\) 4.62 c \\
5 & 250 g/L Azoxystrobin & 16.31 \(\pm\) 1.21 ** & 69.91 \(\pm\) 2.24 b \\
6 & 50\% Carbendazim & 29.22 \(\pm\) 2.86 ** & 46.11 \(\pm\) 5.27 d \\
7 & Biocontrol agent & 17.83 \(\pm\) 0.78 *** & 67.11 \(\pm\) 1.44 b \\
8 & CK & 54.22 \(\pm\) 0.71 & - \\ \hline \hline \end{tabular}
\end{table} 
Table 5: Inhibitory effects of different fungicides on northern corn leaf blight after straw spray application.