Selected silicon fertilizers and inducing agents applied by foliar sprays compared for the control of Venturia inaequalis and V. pirina on fruit of apple (Malus cv. Golden Delicious) and pear (Pyrus communis ‘Williams’ Bon Chrétien’), respectively, as measured by leaf chlorophyll content SPAD values.
| Treatment | Apple scab SPADz | Pear scab SPADz | ||
|---|---|---|---|---|
| 2014 | 2015 | 2014 | 2015 | |
| Water (control) | 24.5a | 27.3a | 29.2a | 32.2a |
| Sil-MATRIX (10ml liter of water) | 30.0ab | 32.4ab | 33.8ab | 37.5ab |
| Salicylaldehyde | 31.8b | 33.2abc | 34.1abc | 36.4ab |
| Fossil (10 ml liter of water) | 34.0b | 37.1bcd | 35.5abc | 34.9a |
| Sirius (10 ml liter of water) | 31.2a | 38.8bcd | 36.9bc | 37.2ab |
| Rigel (3 ml liter of water) | 36.1b | 39.4cd | 39.9bc | 42.6bc |
| Topas (1.5 ml liter of water) | 36.4b | 40.2d | 41.4c | 44.8c |
| Treatment | 0.035 | 0.044 | 0.031 | 0.050 |
↵z Mean of ten randomized complete blocks with one tree per block. Ten leaves per tree were randomly selected throughout the crown for chlorophyll content measurements, and the mean was calculated per tree for statistical purposes.
Note: Lowercase letters indicate significant differences between means for each evaluation date by Tukey highly significance test (P = 0.05).