Table 2
Influence of treatment of sunflower seeds of variety R-453 with the laboratory samples of the microbiological preparations on a level of seedlings infection with Phoma macdonaldii in lab conditions under artificial infection using a method of ‘agar blocks’
| Variant | Titer, CRU per g | Infected seedlings, % | Biological efficiency, %, | ||||
| Infection level of the main root, points | Totally | ||||||
| 0 | 1 | 2 | 3 | ||||
| Control, without treatment | - | 0 | 0 | 30.0 | 40.0 | 70.0* | - |
| Fungi-producers | |||||||
| M-24 Penicillium sp. | 7.8х109 | 90.0 | 0 | 10.0 | 0 | 10.0 | 85.7 |
| Xk-1 Chaetomium olivaceum | 4.0х107 | 80.0 | 0 | 20.0 | 0 | 20.0 | 71.4 |
| Pr-1 Penicillium rugulosum | 6.0х109 | 70.0 | 0 | 0 | 30.0 | 30.0 | 57.1 |
| T-2 Trichoderma sp. | 2.8х109 | 60.0 | 30.0 | 0 | 10.0 | 40.0 | 42.9 |
| Tt-1 Talaromyces trachispermus | 6.8х107 | 60.0 | 10.0 | 10.0 | 20.0 | 40.0 | 42.9 |
| Bacteria-producers | |||||||
| 5B-1 B. subtilis | 5,0х1010 | 80.0 | 0 | 20.0 | 0 | 20.0 | 71.4 |
| 5-3 Bacillus sp. | 3,0х1010 | 70.0 | 0 | 0 | 30.0 | 30.0 | 57.1 |
| B-5 B. licheniformis | 4,8х1010 | 70.0 | 10.0 | 10.0 | 10.0 | 30.0 | 57.1 |
| 11-1 Bacillus sp. | 2,0х1010 | 70.0 | 20.0 | 10,0 | 0 | 30.0 | 57.1 |
| Oif 2-1 Pseudomonas sp. | 1,8х1011 | 80.0 | 0 | 10.0 | 10.0 | 20.0 | 71.4 |
| 14-3 P. chlororaphis | 3,0х1011 | 80.0 | 0 | 10.0 | 10.0 | 20.0 | 71.4 |
| Sgc-1 Pseudomonas sp. | 2,8х1011 | 70.0 | 20.0 | 10.0 | 0 | 30.0 | 57.1 |
*Note: a degree of sunflower seedlings infection, points:
0 – healthy root;
1 – darkening of root tips, formation of lateral roots;
2 – darkening of root by one third or to the middle, formation of lateral roots;
3 – overwinding of rot in the middle part of a root or between hypocotyl and root, formation of lateral roots
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