Spectrum Technologies WatchDog 2400 - Page 37

37
Average
Temp.
Degree of Infection (hrs)
(°F) Light Medium Heavy
50 14 19 29
49 14.5 20 30
48 15 20 30
47 15 23 35
46 16 24 37
45 17 26 40
44 19 28 43
43 21 30 47
42 23 33 50
41 26 37 53
40 29 41 56
39 33 45 60
38 37 50 64
37 41 55 68
33 to 36 48 72 96
Approximate numbers of hours of wetting
required for primary apple scab infection
at different air temperatures
Apple Mills Table