Table 1.
The effects of different concentrations of chitosan (CHT) and aminochitosan variants on the average mycelial radial inhibition and sporulation of B. cinerea, 11 days after incubation.
| Treatment | Concentration (mg/mL) | Radial Inhibition | Sporulation | ||
|---|---|---|---|---|---|
| Growth area (mm2) ± SD |
PIRG (%) ± SD | Spores/mL ± SD | PIS (%) ± SD | ||
| PDA | 0 | 491 ± 0 | 0 ± 0a | 21 133 ± 17 365 | 0 ± 0a |
| 0.1% acetic acid | 0 | 133 ± 39 | 73 ± 15bc | 31 260 ± 17 442 | 7 ± 24a |
| Chitosan | 0.5 | 298 ± 195 | 39 ± 32b | 44 633 ± 33 383 | -27 ± 56a |
| 1 | 70 ± 58 | 86 ± 10cd | 35 967 ± 30 505 | 3 ± 57a | |
| 2.5 | 56 ± 84 | 89 ± 14de | 5 600 ± 5 808 | 84 ± 13b | |
| 5 | 0 ± 0 | 100 ± 0e | 100 ± 141 | 99 ± 1b | |
| PDA | 0 | 491 ± 0 | 0 ± 0a | 21 133 ± 17 365 | 0 ± 0a |
| Diamino 1 | 0.5 | 279 ± 109 | 43 ± 16b | 103 850 ± 120 703 | -164 ± 217b |
| 1 | 118 ± 151 | 76 ± 22bc | 16 200 ± 5 940 | 59 ± 15ab | |
| 2.5 | 0 ± 0 | 100 ± 0c | 0 ± 0 | 100 ± 0c | |
| 5 | 0 ± 0 | 100 ± 0c | 0 ± 0 | 100 ± 0c | |
| PDA | 0 | 491 ± 0 | 0 ± 0a | 21 133 ± 17 365 | 0 ± 0a |
| Diamino 2 | 0.5 | 314 ± 148 | 36 ± 14b | 65 400 ± 104 790 | -70 ± 215a |
| 1 | 65 ± 27 | 87 ± 5c | 33 600 ± 54 487 | 14 ± 138a | |
| 2.5 | 34 ± 12 | 93 ± 2cd | 1333 ± 14 045 | 97 ± 4b | |
| 5 | 7 ± 11 | 98 ± 2d | 450 ± 636 | 98 ± 3b | |
PIRG% = percentage inhibition of radial growth (PIRG), and PIS% = percentage inhibition of sporulation (PIS). A negative PIS% indicates growth greater than the control. Means ± SD (standard deviation) followed by the same superscript letter are not significantly different from each other (Kruskal-Wallis test followed by Dunn’s post-hoc test, p< 0.05). The values shown are the average of three experiments.