Table 2.
Response of rice sheath-blight disease variables to various treatments based on biological formulations
| Treatment a | Period of Incubation (days) b | Initial incidence (%) c | Initial severity (%) c | Final incidence (%) d | Final severity (%) d | Efficacy on AUDPC-INC (%) e | Efficacy on AUDPC-SEV (%) e |
|---|---|---|---|---|---|---|---|
| P1 | 14 | 3.70 (2.34)f bc | 0.82 (0.52) bc | 12.63 (5.71) ab | 7.33 (3.31) ab | 60.77 (18.22) ab | 59.41 (19.53) ab |
| P2 | 14 | 3.33 (2.11) bc | 0.55 (0.38) bc | 5.42 (2.45) b | 2.87 (1.45) b | 67.23 (16.58) ab | 68.69 (15.99) ab |
| TRICOTEC-S | 14 | 3.52 (2.23) bc | 1.19 (0.83) bc | 12.27 (3.04) ab | 6.75 (1.95) ab | 51.06 (15.96) b | 39.09 (15.22) b |
| THIFLUZAMIDE | 14 | 1.85 (1.85) c | 0.41 (0.41) c | 11.11 (5.74) b | 5.35 (3.07) b | 77.06 (10.57) a | 71.69 (12.92) a |
| CONTROL | 14 | 16.94 (3.73) a | 3.33 (1.13) a | 22.78 (4.39) a | 11.75 (2.36) a | - | - |
| P11 | 49 | 0.00 (0.00) c | 0.00 (0.00) c | 10.08 (2.57) ab | 5.73 (2.08) ab | 81.60 (9.25) a | 66.82 (15.63) ab |
| P12 | 14 | 9.60 (3.50) b | 1.74 (0.79) b | 23.97 (6.49) a | 11.33 (3.09) a | 23.46 (11.16) b | 24.11 (11.88) b |
a Rice plants were grown in soil artificially inoculated with R. solani Rh002; P1 and P2 = microencapsulate prototypes based on T. koningiopsis Th003 applied once at sowing of rice seeds; TRICOTEC-S = commercial biofungicide TRICOTEC WG based on Th003, applied by drench once at sowing; THIFLUZAMIDE = chemical fungicide Pulsor 2SC (SummitAgro) at dose of 1,5 mL L-1 sprayed at 30 and 45 days after seedlings emergence according to the manufacturer directions; CONTROL: untreated plants; P11 and P12 = microencapsulate prototypes free of Th003. b Days from sown until symptoms expression of disease in rice plants.c Disease incidence and severity at 14 days after planting and d Disease incidence and severity at 69 days after planting. Values represent the average of 6 replications; analyses were performed after arcsine-square root transformation of the corresponding percent data.e The efficacy of treatments for reduce the area under incidence and severity progress curves (AUDPC-INC and AUDPC-SEV, respectively) was calculated with respect to the CONTROL.f Value in parentheses represent the standard error of six replications from two independent experiments with similar results
Treatments in each column with the same letter are not significantly different according to Duncan’s multiple range test (α = 0.05)