Treatment | Apple scab severity on leaves^{y} | Pear scab severity on leaves^{y} | ||
---|---|---|---|---|

2014 | 2015 | 2014 | 2015 | |

Water (control) | 4.8a | 5.0a | 3.4a | 3.4a |

Sil-MATRIX (10 ml liter of water) | 2.7bc | 3.0bc | 2.4b | 2.4b |

Salicylaldehyde | 3.0b | 3.2b | 2.2b | 2.4b |

Fossil (10 ml liter of water) | 2.3bc | 2.2bcd | 1.9b | 2.0bc |

Sirius (10 ml liter of water) | 2.3bc | 2.4bcd | 1.8b | 2.0bc |

Rigel (3 ml liter of water) | 1.6cd | 1.8de | 1.6bc | 1.4cd |

Topas (1.5 ml liter of water) | 0.4d | 0.8e | 0.8c | 1.0d |

Treatment | <0.001 | <0.001 | <0.001 | <0.001 |

↵

^{z}Scab severity index: 0 = no scab observed; 1 = less than 5% of leaves affected and no aesthetic impact; 2 = 5%–20% of leaves affected with some yellowing but little or no defoliation; 3 = 21%–50% of leaves affected, significant defoliation, and/or leaf yellowing; 4 = 51%–80% of leaves affected, severe foliar discoloration; 5 = 81%–100% of foliage affected with 90%–100% defoliation.↵

^{y}Mean of ten randomized complete blocks with one tree per block.Note: Lowercase letters indicate significant differences between means for each evaluation date by Tukey highly significance test (

*P*= 0.05).