Table 2.
Field efficacy of various fungicides on the severity of rice blast disease (2018).
| 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 | 21.88 ± 0.69 b | 35.27 ± 0.76 c | 7.45 ± 0.56 c |
| Azoxystrobin 18.2% + difenconazole 11.4% SC | Amistar® Top | triazole plus strobilurin | 1 mL | 8.97 ± 0.71 e | 12.56 ± 0.40 i | 2.53 ± 0.55 g |
| Azoxystrobin 11% + tebuconazole 18.3% SC |
Custodia | triazole plus strobilurin | 1.5 mL | 9.57 ± 0.57 e | 15.52 ± 1.25 h | 3.00 ± 0.20 f,g |
| Tricyclazole 18% + mancozeb 62% WP |
Merger | triazole plus dithiocarbamate |
2.5 g | 11.67 ± 0.64 d | 18.8 ± 0.54 g | 3.89 ± 0.35 e,f |
| Zineb 68% + hexaconazole 4% | Avatar | triazole plus dithiocarbamate |
2.5 g | 17.09 ± 0.56 c | 28.12 ± 0.76 e | 6.21 ± 0.46 d |
| Trifloxystrobin 25% + tebuconazole 50% WG | Nativo® | triazole plus strobilurin | 0.4 g | 11.54 ± 0.53 d | 20.19 ± 0.80 f | 4.89 ± 0.23 e |
| Mancozeb 50% + Carbendazim 25% WS | Sprint® | dithiocarbamate plus benzimidazole | 2.5 g | 12.3 ± 0.96 d | 36.55 ± 0.68 b | 10.05 ± 1.07 b |
| Fluxapyroxad 62.5 g/L + epoxiconazole 62.5 g/L EC | Adexar® | pyrazole-carboximide plus triazole | 1.5 mL | 22.57 ± 1.54 b | 30.83 ± 0.72 d | 7.61 ± 0.45 c |
| Tricyclazole 75% | Force 11TM | melanin biosynthesis inhibitors—reductase | 0.6 g | 6.86 ± 0.90 f | 12.22 ± 0.35 i | 2.95 ± 0.10 f,g |
| Water (Control) | - | - | - | 64.92 ± 0.52 a | 87.50 ± 1.47 a | 26.24 ± 1.13 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.