The influence of fungicide and harpin protein combinations applied as foliar sprays on symptom severity of pear scab (Venturia pirini) on Pyrus communis ‘Williams’ Bon Chrétien.’
| Treatment | Chlorophyll content | Leaf scab symptom severityz | Fruit scab symptom severityz | Fruit yield |
|---|---|---|---|---|
| Water (control) | 31.5a | 3.9c | 1.8c | 11.4a |
| Harpin protein (HP) | 37.2ab | 2.5b | 1.3b | 13.0abc |
| Boscalid + pyraclostrobin 0.9 g/L | 44.1bc | 0.8a | 0.0a | 14.8bc |
| Boscalid + pyraclostrobin 0.9 g/L + HP | 48.8c | 0.2a | 0.0a | 15.0c |
| Boscalid + pyraclostrobin 0.6 g/L + HP | 40.2bc | 1.0a | 0.5a | 13.4abc |
| Boscalid + pyraclostrobin 0.3 g/L + HP | 36.1ab | 2.2b | 1.6bc | 12.0ab |
↵zAll values mean of 80 leaves (10 leaves per tree) and 40 fruits (5 fruits 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).