Table 2. The effect of entomopathogenic fungi on the forms of Rhizoctonia disease in tubers (mean ± SE, 120 tubers from each treatment).
| Forms of Rhizoctonia disease | Share of tubers, % | ||
|---|---|---|---|
| Control | M. robertsii | B. bassiana | |
| No signs of blight | 42.50 ± 4.77ab | 53.75 ± 4.27a | 36.25 ± 2.39b |
| Weakly scab-like symptoms | 20.00 ± 5.77 | 8.75 ± 2.39 | 25.00 ± 4.56 |
| Scab-like symptoms | 10.00 ± 2.50 | 13.33 ± 3.82 | 10.00 ± 3.54 |
| Dry core symptoms | 1.25 ± 1.25 | – | – |
| Scab-like symptoms + cracks | 15.00 ± 7.07 | 23.75 ± 3.75 | 25.00 ± 5,40 |
| Without black scrub | 86.25 ± 2.39a | 96.25 ± 2.39b | 96.25 ± 2.39b |
| Black scrub (the surface of tuber covered with sclerotia) | |||
| On 1/2 | – | – | – |
| 1/4 | – | – | – |
| 1/10 | 6.25 ± 1.25 | – | – |
| Single sclerotia | 3.75 ± 1.25 | 1.25 ± 1.25 | 2.50 ± 1.44 |
| Combined forms | |||
| Sclerotia 1/2 + scab-like | – | – | – |
| Sclerotia 1/4 + scab-like | 1.25 ± 1.25 | – | – |
| Sclerotia 1/10 + scab-like | 1.25 ± 1.25 | 1.25 ± 1.25 | – |
| Single sclerotia + scab-like | 1.25 ± 1.25 | – | – |
| Sclerotia 1/2 + scab-like + cracks | – | – | – |
| Sclerotia 1/4 + scab-like + cracks | – | – | – |
| Sclerotia 1/10 + scab-like + cracks | – | – | – |
| Single sclerotia + scab-like + cracks | – | 1.25 ± 1.25 | – |
| Sclerotium index | 0.86 ± 0.07a | 0.44 ± 0.09b | 0.50 ± 0.10b |
Notes.
The same letters indicate insignificant differences between treatments (Fishers LSD, P > 0.05).