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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.

 

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Last Revised: 3-5-99
Last Updated: January 17, 2007
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