Table 3.
Field efficacy of various fungicides on the severity of rice blast disease (2019).
| Active Ingredient | Fungicide | Chemical Group | Concentration per Liter of Water | Leaf Blast Incidence |
Neck Blast Incidence |
Leaf Blast Severity |
|---|---|---|---|---|---|---|
| Flusilazole 12.5% + carbendazim 25% SC | Lustre | triazole plus benzimidazoles |
1 mL | 22.64 ± 0.94 c,b | 36.23 ± 1.50 b | 8.76 ± 0.80 c |
| Azoxystrobin 18.2% + difenconazole 11.4% SC | Amistar® Top | triazole plus strobilurin |
1 mL | 9.19 ± 1.35 f | 14.74 ± 2.21 f | 3.43 ± 0.46 f |
| Azoxystrobin 11% + tebuconazole 18.3% SC | Custodia | triazole plus strobilurin |
1.5 mL | 10.40 ± 0.60 e,f | 16.64 ± 0.97 f | 3.82 ± 0.27 e,f |
| Tricyclazole 18% + mancozeb 62% WP | Merger | triazole plus dithiocarbamate |
2.5 g | 12.49 ± 0.50 e | 20.01 ± 0.74 e | 4.93 ± 0.20 e |
| Zineb 68% + hexaconazole 4% | Avatar | triazole plus dithiocarbamate |
2.5 g | 18.61 ± 1.11 d | 29.51 ± 1.34 d | 6.72 ± 0.42 d |
| Trifloxystrobin 25% + tebuconazole 50% WG | Nativo® | triazole plus strobilurin |
0.4 g | 12.43 ± 0.56 e | 19.92 ± 0.86 e | 4.68 ± 0.87 e,f |
| Mancozeb 50% + Carbendazim 25% WS | Sprint® | dithiocarbamate plus benzimidazole |
2.5 g | 27.61 ± 0.75 b | 38.31 ± 1.36 b | 10.78 ± 0.58 b |
| Fluxapyroxad 62.5 g/L + epoxiconazole 62.5 g/L EC | Adexar® | pyrazole-carboximide plus triazole |
1.5 mL | 23.22 ± 0.39 c | 33.22 ± 0.39 c | 8.84 ± 0.76 c |
| Tricyclazole 75% | Force 11TM | melanin biosynthesis inhibitors—reductase | 0.6 g | 8.41 ± 0.80 f | 14.10 ± 0.97 f | 3.56 ± 0.54 f |
| Water (Control) | - | - | - | 66.78 ± 7.04 a | 89.14 ± 4.22 a | 27.98 ± 1.72 a |
Rice blast severity on a scale of 0–9, where 0 = no symptoms, and 9 = most severe (IRRI, 2013). Means ± standard deviations in each column followed by different superscripted letters are significantly different at p < 0.05 based on DMRT.