This is the final version of the 1996 Primary Apple Scab Infection Periods for the Peach Ridge Weather Station in Sparta Michigan.
1996 Peach Ridge Data Final Version June 26, 1996
Rain
No.
Stage
McIntosh
Date
Start
Time
Rainfall
Hours
Ave.
Temp.
Fo
Mills
Severity
*Spores
/rod
Index
DDBase
32
% Mature
Spores
Predicted
Lesion
Date
Date
Lesion
Found
1.
1st Green
4-18
11:00 pm
.18
10
54
None
0
None
0
0
2.
1st Green
4-19
7:00 pm
.56
15
56
Moderate
1
Light
0
0
5-8
3.
1st Green
4-20
2:00 pm
.06
20
45
Light
0
None
29
1
5-9
4.
1st Green
4-22
5:00 am
.17
12
50
None
6
Light
70
2
5-11
5.
Green Tip
4-25
3:30 am
.32
11
50
None
42
Light
114
3
5-14
6.
Green Tip
4-26
7:45 am
.07
5
36
None
6
Light
138
4
5-14
7.
1/4" Green
4-29
5:00 am
.27
43
37
Light
188
Light
170
6
5-16
5-17
8.
1/2" Green
5-3
6:30 am
.04
3
48
None
12
Light
213
10
5-18
9.
1/2" Green
5-8
2:00 pm
1.74
63
52
Heavy
34
Light
316
25
5-20
5-21
10.
Tight Cluster
5-15
8:00 am
.07
4
42
None
436
45
5-24
11.
Full Bloom
5-20
1:00 am
2.42
32
60
Heavy
619
82
5-30
5-31
12.
Full Bloom
5-23
1:00 am
.08
6
59
None
707
92
6-3
13.
Petal Fall
5-25
11:00 am
.16
10
47
None
760
96
6-5
14.
7 DAPF
6-1
4:15 pm
.64
21
62
Heavy
90
Light
915
100
6-11
6-11
15.
10 DAPF
6-4
11:00 pm
.27
11
56
Light
40
Light
950
6-12
16.
10 DAPF
6-4
8:45 am
.02
4
53
None
10
Light
1007
6-14
17.
12 DAPF
6-6
2:00 am
.60
62
60
Heavy
3
Light
1055
6-16
6-18
18.
15 DAPF
6-9
8:00 am
.41
56
61
Heavy
2
Light
1139
6-19
19.
19 DAPF
6-13
5:00 am
.07
4
62
None
0
None
1272
6-22
20.
23 DAPF
6-17
6:00 am
4.05
28
63
Heavy
0
None
1429
6-26
*Spore counts collected from a Peach Ridge commerical orchard that had scab last year. Two orchards were used this year. Spore numbers were low in orchard number one the first half of the season, so orchard number two was used the second half of the primary season.
**Data based on B-E DD calculations.
Spores levels guide
Spore Maturity Guide
DD Base 32 Fo
% Mature Spores
Light
Moderate
Heavy
0-10
10-50
50-5000
320
445
565
736
750
765
800
830
880
25
50
75
95
96
97
98
99
100