Bacterial Canker Control for Sweet Cherries
Approximate number of hours of wetting required for conidial infection by the leaf spot fungus at different air temperatures (a)
| Wetting Period (hr) (b) | ||||
| Average temperature |
Light infection |
Moderate infection |
Heavy infection |
|
| (F) | (C) | |||
| 81 | 27.2 | 28 | 43 | - |
| 80 | 26.7 | 21 | 35 | - |
| 79 | 26.1 | 18 | 30 | - |
| 78 | 25.5 | 16 | 27 | 42 |
| 77 | 25.0 | 14 | 24 | 36 |
| 76 | 24.4 | 12 | 21 | 32 |
| 75 | 23.8 | 11 | 19 | 29 |
| 74 | 23.3 | 9 | 18 | 27 |
| 73 | 22.7 | 8 | 16 | 25 |
| 72 | 22.2 | 7 | 15 | 23 |
| 71 | 21.6 | 7 | 14 | 22 |
| 70 | 21.1 | 6 | 13 | 21 |
| 69 | 20.5 | 6 | 13 | 20 |
| 63 - 68 | 17.2 - 20.0 | 5 | 12 | 19 |
| 62 | 16.6 | 6 | 12 | 19 |
| 61 | 16.1 | 6 | 13 | 20 |
| 60 | 15.5 | 7 | 13 | 20 |
| 59 | 15.0 | 7 | 14 | 21 |
| 58 | 14.4 | 8 | 15 | 22 |
| 57 | 13.8 | 9 | 16 | 23 |
| 56 | 13.3 | 10 | 17 | 24 |
| 55 | 12.7 | 11 | 18 | 25 |
| 54 | 12.2 | 12 | 19 | 27 |
| 53 | 11.6 | 14 | 21 | 29 |
| 52 | 11.1 | 15 | 23 | 31 |
| 51 | 10.5 | 17 | 25 | 33 |
| 50 | 10.0 | 19 | 27 | 35 |
| 49 | 9.4 | 20 | 29 | 38 |
| 48 | 8.8 | 23 | 32 | 42 |
| 47 | 8.3 | 25 | 34 | 46 |
| 46 | 7.7 | 28 | 38 | 51 |
(a) Adapted from Eisensmith and Jones, 1981. Plant Dis. 65:955-958 and Phytopathology 71:728-732.
(b) The infection period is considered to start when rain begins.
Please send any comments or suggestions
regarding this site to:
Bill Klein, kleinw@msu.edu
Last Revised: 3-5-99
