33
Daily Average
Temperature (F)
Hours of Leaf Wetness required
for heavy ascospore infection
(2/3 original Mills value)
42
40
43
34
44
30
45
27.3
46
25.3
47
23.3
48-49
20
50
19.3
51
18
52
17.3
53
16.7
54-55
16
56-57
14.7
58-59
14
60-61
13.3
62
12.7
63-75
12
76
12.7
77
14
78
17.3
Conidial Index:
0 - 30 = Light infection risk
40 - 50 = Medium infection risk
60 - 100 = Heavy infection risk
Grape Mills Table
