Grant Weather and Disease Daily Summary (Report issued 4/18/2024 8:04 )
Wetting periods start with rainfall (at least 0.01 inch) and continue
until the start of at least eight hours without moisture (rainfall, leaf wetness, high relative humidity).
Wetting periods are classified as "ongoing" until eight consecutive dry hours have passed.
After that, the official end of the wetting period is recorded (the start of the 8 hour dry period).
McIntosh Green Tip for Grant estimated as 3/11/2024 (110 DD Base 42 after 1/1).
Expansion of first bract leaves in cherry (beginning of risk period) for Grant estimated as 4/14/2024 (320 DD Base 42 after 1/1).
Black rot model available after 4/15. Pre-bloom not reached. Using 5/1/2024 as a default date.
Time period assessed for wetting events: 4/4 to 4/18/2024
Rainfall data missing for: 4/21 - 4/24
Rainfall data estimated for: 1/15
Min/max temperature data estimated for: 1/15
* Estimated values are highlighted in BOLD
| Day |
Date |
Min Temp (°F) |
Max Temp (°F) |
Avg temp (°F) |
Rainfall (in) |
Rainfall since 1/1 |
M |
D |
Number of Events |
Wetting
Event(s)-
Duration
(hours) |
T |
AS |
CLS |
BLKR |
Notes: Spray timing, scouting results, growth stage, site observations, etc. |
| Thu |
4/4 |
34 |
45.1 |
39.6 |
0.09 |
6.49 |
7% |
1% |
1 |
4/1 7-8PM to 4/5 8-9AM
Wet: 77
Span: 86 |
37.6 |
Heavy (Symptoms appear: 4/22) |
No risk until first bract leaves have expanded. |
No risk until pre-bloom period |
|
| Fri |
4/5 |
33.6 |
50.5 |
42 |
0 |
6.49 |
8% |
1% |
0 |
-- |
-- |
-- |
-- |
-- |
|
| Sat |
4/6 |
28.6 |
59.5 |
44 |
0 |
6.49 |
9% |
1% |
0 |
-- |
-- |
-- |
-- |
-- |
|
| Sun |
4/7 |
33.1 |
60.5 |
46.8 |
0.04 |
6.53 |
10% |
2% |
1 |
4/7 8-9PM to 4/8 2-3AM
Wet: 4
Span: 7 |
46.2 |
None |
No risk until first bract leaves have expanded. |
No risk until pre-bloom period |
|
| Mon |
4/8 |
43.2 |
68.8 |
56 |
0 |
6.53 |
13% |
3% |
0 |
-- |
-- |
-- |
-- |
-- |
|
| Tue |
4/9 |
40.5 |
65.7 |
53.1 |
0 |
6.53 |
16% |
3% |
0 |
-- |
-- |
-- |
-- |
-- |
|
| Wed |
4/10 |
35.4 |
66.5 |
50.9 |
0 |
6.53 |
19% |
5% |
0 |
-- |
-- |
-- |
-- |
-- |
|
| Thu |
4/11 |
44.7 |
54.8 |
49.7 |
0.24 |
6.77 |
21% |
6% |
1 |
4/11 1-2PM to 4/12 Noon-1PM
Wet: 24
Span: 24 |
46 |
Moderate (Symptoms appear: 5/1) |
No risk until first bract leaves have expanded. |
No risk until pre-bloom period |
|
| Fri |
4/12 |
42.8 |
56.4 |
49.6 |
0.09 |
6.86 |
24% |
7% |
1 |
continuing |
continuing |
continuing |
continuing |
continuing |
|
| Sat |
4/13 |
36.3 |
59.7 |
48 |
0 |
6.86 |
27% |
8% |
0 |
-- |
-- |
-- |
-- |
-- |
|
| Sun |
4/14 |
45.5 |
75.3 |
60.4 |
0 |
6.86 |
33% |
11% |
0 |
-- |
-- |
-- |
-- |
-- |
|
| Mon |
4/15 |
39.6 |
70.1 |
54.8 |
0 |
6.86 |
37% |
14% |
0 |
-- |
-- |
-- |
-- |
-- |
|
| Tue |
4/16 |
41.3 |
70.1 |
55.7 |
0 |
6.86 |
43% |
17% |
0 |
-- |
-- |
-- |
-- |
-- |
|
| Wed |
4/17 |
48.2 |
70.1 |
59.1 |
0.5 |
7.36 |
49% |
20% |
1 |
4/17 1-2AM to 4/17 8-9PM
Wet: 12
Span: 20 |
54.5 |
Light (Symptoms appear: 5/9) |
Low |
No risk until pre-bloom period |
|
Today's data:
| Day |
Date |
Min Temp (°F) |
Max Temp (°F) |
Avg temp (°F) |
Rainfall (in) |
Rainfall since 1/1 |
M |
D |
Number of Events |
Wetting
Event(s)-
Duration
(hours) |
T |
AS |
CLS |
BLKR |
Notes: Spray timing, scouting results, growth stage, site observations, etc. |
| Thu |
4/18 |
Actual (7:10-7:15AM): 42.7 |
Forecast: 57 |
49.85 |
0.01 |
7.37 |
53% |
23% |
0 |
-- |
-- |
-- |
-- |
-- |
|
Forecast data:
| Day |
Date |
Min Temp (°F) |
Max Temp (°F) |
Avg
temp
(°F) |
Rainfall
(in) |
Rainfall
since
1/1 |
M |
D |
| Fri |
4/19 |
40 |
51 |
45.5 |
0.19 |
7.56 |
55% |
25% |
| Sat |
4/20 |
37 |
46 |
41.5 |
0 |
7.56 |
58% |
26% |
| Sun |
4/21 |
31 |
52 |
41.5 |
NA |
7.56 |
60% |
28% |
| Mon |
4/22 |
34 |
59 |
46.5 |
NA |
7.56 |
63% |
30% |
| Tue |
4/23 |
42 |
56 |
49 |
NA |
7.56 |
66% |
33% |
| Wed |
4/24 |
37 |
58 |
47.5 |
NA |
7.56 |
69% |
36% |
*NOTE: Infection is predicted with fewer hours than listed in the 'Wet hrs @ avg temp' column. This can happen when there are falling temperatures. Infection may have occurred early in the period during warm temperatures, but the colder temperatures later in the period decrease the number displayed as the average temperature for the period.
Note: Infection periods and wetting events listed on the day of the start of the period/event.
T = Average temperature of wetting event
M = Percent of ascospores matured, based on Gadoury et al.
D = Percent of the matured spores that have discharged, based on unpublished model by Dr. Alan Jones.
AS = Apple Scab
CLS = Cherry Leaf Spot
BLKR = Grape Black Rot
