Table 3 Pre-harvest fruit drop of Hamlin sweet orange trees treated with various SAR inducers in a three-year field trial (2015–2018)
Treatment | No. of fruit dropped z | |||
|---|---|---|---|---|
2015 | 2016 | 2017 | 2018 | |
UTC | 136 ± 29 a B | 149 ± 32 a B | 214 ± 43 a A | 148 ± 35 a B |
ASM spray (0.25 g/tree) | 128 ± 26 a B | 139 ± 28 a B | 217 ± 47 a A | 137 ± 33 a B |
ASM spray (0.5 g/tree) | 139 ± 32 a B | 145 ± 31 a B | 229 ± 45 a A | 147 ± 32 a B |
ASM soil drench (0.25 g/tree) | 133 ± 27 a B | 148 ± 34 a B | 237 ± 46 a A | 146 ± 29 a B |
ASM soil drench (0.5 g/tree) | 129 ± 24 a B | 141 ± 28 a B | 221 ± 41 a A | 135 ± 31 a B |
ASM injection (0.125 g/tree) | 135 ± 32 a B | 124 ± 30 a B | 216 ± 38 a A | 129 ± 33 a B |
ASM injection (0.25 g/tree) | 143 ± 28 a B | 78 ± 21 b C | 235 ± 45 a A | 69 ± 24 b C |
IMI spray (0.25 g/tree) | 126 ± 29 a B | 139 ± 33 a B | 219 ± 36 a A | 144 ± 30 a B |
IMI spray (0.5 g/tree) | 138 ± 31 a B | 124 ± 28 a B | 228 ± 41 a A | 152 ± 37 a B |
IMI soil drench (0.25 g/tree) | 143 ± 30 a B | 132 ± 31 a B | 242 ± 48 a A | 137 ± 31 a B |
IMI soil drench (0.5 g/tree) | 132 ± 28 a B | 147 ± 35 a B | 233 ± 44 a A | 144 ± 33 a B |
IMI injection (0.125 g/tree) | 145 ± 34 a B | 131 ± 29 a B | 226 ± 39 a A | 150 ± 38 a B |
IMI injection (0.25 g/tree) | 128 ± 29 a B | 71 ± 20 b C | 215 ± 37 a A | 79 ± 21 b C |
INA spray (0.25 g/tree) | 121 ± 29 a B | 138 ± 32 a B | 237 ± 48 a A | 139 ± 35 a B |
INA spray (0.5 g/tree) | 137 ± 30 a B | 145 ± 35 a B | 219 ± 46 a A | 70 ± 25 b B |
INA soil drench (0.25 g/tree) | 129 ± 28 a B | 139 ± 32 a B | 240 ± 48 a A | 142 ± 31 a B |
INA soil drench (0.5 g/tree) | 140 ± 29 a B | 151 ± 31 a B | 226 ± 44 a A | 133 ± 30 a B |
INA injection (0.125 g/tree) | 132 ± 31 a B | 127 ± 27 a B | 215 ± 35 a A | 127 ± 34 a B |
INA injection (0.25 g/tree) | 145 ± 32 a B | 72 ± 20 b C | 230 ± 43 a A | 77 ± 24 b C |
SA spray (0.25 g/tree) | 136 ± 27 a B | 148 ± 32 a B | 242 ± 49 a A | 129 ± 35 a B |
SA spray (0.5 g/tree) | 129 ± 30 a B | 140 ± 34 a B | 227 ± 44 a A | 81 ± 22 b C |
SA soil drench (0.25 g/tree) | 133 ± 27 a B | 148 ± 34 a B | 237 ± 46 a A | 146 ± 29 a B |
SA soil drench (0.5 g/tree) | 142 ± 32 a B | 133 ± 27 a B | 222 ± 48 a A | 133 ± 33 a B |
SA injection (0.125 g/tree) | 126 ± 28 a B | 140 ± 31 a B | 235 ± 44 a A | 142 ± 35 a B |
SA injection (0.25 g/tree) | 141 ± 31 a B | 77 ± 23 b C | 225 ± 42 a A | 69 ± 21 b C |