Figure 1

Figure 2

Figure 3

Figure 4

Severity (%) variation of Q_ ilex anthracnose according to leaf position on twigs
| Bordjem | Tougurt | Chelaâlaâ | Ain Ali | |
|---|---|---|---|---|
| NAP | 20.02 ± 0.22b | 32.93 ± 0.21a | 21.55 ± 0.23a | 14.08 ± 0.28a |
| AP | 25.43 ± 0.63a | 36.34 ± 0.22a | 22.43 ± 0.25a | 13.07 ± 0.33a |
| P | 0.0193 | 0.1347 | 0.6597 | 0.6916 |
Cultural characteristics of the 35 D_ quercina isolates on MEA medium
| Site | Isolates | Morphotype | Sporulation | Acervuli | (Diam mm) | CUps | CLws | Shape | ConidiaL (μm) | ConidiaW (μm) |
|---|---|---|---|---|---|---|---|---|---|---|
| Bordjem | DQBS1 | M1 | S | – | 37.00 | LB | LB | Circular | 9.00 | 5.00 |
| DQBS2 | M1 | S | – | 39.33 | LB | LB | Circular | 11.00 | 3.00 | |
| DQBS3 | M1 | S | – | 47.00 | LB | LB | Circular | 9.00 | 3.00 | |
| DQBS4 | M1 | S | – | 41.67 | LB | LB | Circular | 10.00 | 4.00 | |
| DQBS5 | M3 | S | – | 41.00 | LB | LB | Circular | 9.00 | 3.00 | |
| DQBS6 | M5 | S | – | 40.00 | LB | LB | Circular | 6.00 | 4.00 | |
| DQBN1 | M5 | NS | – | 40.67 | LB | LB | Circular | n/a | n/a | |
| Tougurt | DQTS1 | M1 | S | – | 45.67 | LB | LB | Circular | 7.00 | 3.00 |
| DQTS2 | M1 | S | – | 43.33 | BG | LG | Circular | 8.00 | 3.00 | |
| DQTS3 | M1 | S | – | 41.67 | BG | LG | Circular | 6.00 | 3.00 | |
| DQTN1 | M1 | NS | – | 39.67 | LB | LB | Circular | n/a | n/a | |
| DQTS4 DQTN2 | M2 M2 | S S | – – | 45.33 44.00 | LB LB | LB LB | Circular Circular | 8.00 7.00 | 5.00 3.00 | |
| DQTS5 | M2 | S | – | 46.67 | LB | LB | Circular | 8.00 | 2.00 | |
| DQTN3 | M3 | S | – | 40.00 | LB | LB | Circular | 8.00 | 4.00 | |
| DQTN4 | M3 | NS | – | 41.67 | LB | LB | Circular | n/a | n/a | |
| DQTS6 | M5 | S | – | 47.67 | LB | LBCC | Circular | 9.00 | 3.00 | |
| Chelaâlaâ | DQCN1 | M1 | NS | – | 41.33 | BG | LG | Circular | n/a | n/a |
| DQCS1 | M3 | S | + | 43.67 | LB | LB | Circular | 7.00 | 4.00 | |
| DQCS2 DQCS3 | M4 M5 | S S | – – | 43.67 43.33 | LB BG | LB LG | Circular Circular | 9.00 8.00 | 3.00 4.00 | |
| DQCS4 | M5 | S | – | 42.67 | LB | LB | Circular | 9.00 | 3.00 | |
| DQCS5 | M5 | S | – | 39.00 | LB | LB | Circular | 9.00 | 4.00 | |
| Ain Ali | DQAN1 | M1 | S | – | 33.00 | LB | LB | Circular | 11.00 | 3.00 |
| DQAN2 | M1 | S | – | 42.33 | LB | LB | Circular | 11.00 | 4.00 | |
| DQAN3 | M4 | S | + | 43.33 | LB | LB | Circular | 9.00 | 3.00 | |
| DQAS1 | M1 | S | – | 35.33 | LB | LB | Circular | 8.00 | 4.00 | |
| DQAS2 | M1 | S | – | 45.67 | LB | LBCC | Circular | 8.00 | 3.00 | |
| DQAS3 DQAN4 | M1 M1 | S NS | – – | 41.00 41.33 | LB LB | LB LB | Circular Circular | 9.00 n/a | 4.00 n/a | |
| DQAN5 | M1 | S | + | 49.67 | BG | LG | Circular | 6.00 | 3.00 | |
| DQAS4 | M2 | S | + | 50.00 | BG | LG | Circular | 7.00 | 3.00 | |
| DQAN6 | M2 | NS | – | 46.00 | LB | LB | Circular | n/a | n/a | |
| DQAS5 | M3 | S | – | 40.00 | LB | LB | Circular | 7.00 | 3.00 | |
| DQAS6 | M3 | S | – | 50.67 | LB | LB | Circular | 7.00 | 4.00 |
Mean severity (%) calculated for each sites according to digital image analyses of Q_ ilex leaves affected by anthracnose
| Sites | Number of sampled trees | Number of sampled leaves | Severity (%) | Severity index | Horsfall-Barratt Scale |
|---|---|---|---|---|---|
| Bordjem | 10 | 374 | 21.85 ± 0.18 b | 0.10 | 3.99 ± 0.18 |
| Tougurt | 10 | 350 | 34.52 ± 0.15a | 0.13 | 4.76 ± 0.15 |
| Chelaâlaâ | 10 | 396 | 21.96 ± 0.17b | 0.11 | 4.01 ± 0.17 |
| Ain Ali | 10 | 319 | 13.66 ± 0.22c | 0.03 | 3.03 ± 0.22 |
Variability of anthracnose severity (%) on leaves of Q_ ilex according to the orientation of twigs
| Twig orientation | Bordjem | Tougurt | Chelaâlaâ | Ain Ali |
|---|---|---|---|---|
| East | 20.61 ± 0.39ab | 31.56 ± 0.32b | 21.51 ± 0.35ab | 12.63 ± 0.38b |
| West | 18.35 ± 0.40b | 26.80 ± 0.34b | 17.53 ± 0.38b | 9.79 ± 0.38b |
| North | 20.53 ± 0.34ab | 26.64 ± 0.34b | 19.36 ± 0.64b | 13.87 ± 0.51ab |
| South | 25.79 ± 0.31a | 43.87 ± 0.24a | 26.08 ± 0.28a | 21.60 ± 0.48a |
| P | 0.0773 | <0.0001 | 0.0075 | 0.0093 |