The influence of fungicide and salicylic acid combinations applied as foliar sprays on symptom severity of Guignardia leaf blotch (Guignardia aesculi) on horse chestnut (Aesculus hippocastanum).
| Treatment | Chlorophyll content | Leaf blotch symptom severityz | Mean seed dry weight |
|---|---|---|---|
| Water (control) | 33.8a | 3.2c | 4.8a |
| Salicylic acid (SA) | 37.9ab | 2.4bc | 6.8b |
| Boscalid + pyraclostrobin 0.9 g/L | 41.5ab | 0.5a | 7.9b |
| Boscalid + pyraclostrobin 0.9 g/L + SA | 46.6b | 0.0a | 8.3c |
| Boscalid + pyraclostrobin 0.6 g/L + SA | 40.1ab | 0.8a | 7.7bc |
| Boscalid + pyraclostrobin 0.3 g/L + SA | 38.0ab | 2.3b | 6.8b |
↵zAll values mean of 80 leaves (10 leaves per tree) from 8 randomized complete blocks with a single tree replication per block.
Numbers within a column followed by a common letter are not significantly different according to the Kruskal-Wallis Multiple Comparison Z-test (P ≤ 0.05).