Open Access
Table 2
Antagonistic activity of Alternaria sp. antagonist fungi strains to the causative agent of necrotic leaf spot of grapes, at a temperature of 25 °C on PSA, on the 10th day of cultivation
| Strain of antagonist | Area of the nutrient medium surface colonization | S, cm2 | K1, mm | |
|---|---|---|---|---|
| Antagonist | Pathogen | |||
| % | % | |||
| Alternaria sp. (контроль) | - | 100 | - | |
| Competition for the feeding area with hyperparasitism and antibiosis | ||||
| A-1 Basidiomycota | 100.0 | 52.7 | 42.7 | 0 |
| Т-2 Trichoderma sp. | 100.0 | 38.1 | 30.9 | 7.0 |
| Т-4 Trichoderma sp. | 96.2 | 29.4 | 15.6 | 26.2 |
| Tr-1 Trichothecium sp. | 91.7 | 42.8 | 25.7 | 0 |
| Tk-1 Trichoderma sp. | 88.0 | 45.4 | 25.1 | 0 |
| Т-1 Trichoderma sp. | 87.3 | 47.3 | 27.0 | 4.5 |
| Т-3 Trichoderma sp. | 77.8 | 41.7 | 18.1 | 13.0 |
| Т-5 Trichoderma sp. | 79.5 | 40.2 | 16.8 | 8.0 |
| SM-1 Sordaria sp. | 80.5 | 19.5 | 0.6 | 0 |
| Antagonist suppression by pathogen | ||||
| Рk-1 Penicillium sp. | 41.5 | 62.2 | 4.0 | 0 |
| Pv-3 Penicillium sp. | 37.9 | 55.1 | 3.5 | 0 |
| Хк-3 Chaetomium sp. | 44.1 | 57.3 | 2.4 | 0 |
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