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  • Michigan State University Extension
  • Michigan State University Ag Bio Research
  • Project GREEEN

Romeo Weather and Disease Daily Summary (Report issued 4/23/2024 2:32 )

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 Romeo estimated as 3/25/2021 (110 DD Base 42 after 1/1).
Expansion of first bract leaves in cherry (beginning of risk period) for Romeo estimated as 4/10/2021 (320 DD Base 42 after 1/1).
Black rot model available after 4/15. Pre-bloom estimated as 5/25/2021 (800 DD Base 42 after 1/1).
Time period assessed for wetting events: 5/25 to 6/8/2021
Hourly weather data missing for: 5/27/2021 1-2PM (1 hour); Total of 1 missing hours
Rainfall data estimated for: 5/27
Min/max temperature data estimated for: 5/27

* 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.
Tue 5/25 63.2 86.2 74.7 0 4.79 100% 93% 0 -- -- -- -- --
Wed 5/26 49.4 76.8 63.1 0.15 4.94 100% 94% 1 5/26 7-8AM to 5/26 Noon-1PM
Wet: 6
Span: 6		 65.2 None Low None
Thu 5/27 42.6 62.5 52.5 0.01 4.95 100% 94% 0 -- -- -- -- --
Fri 5/28 40.9 45.1 43 0.74 5.69 100% 95% 1 5/28 1-2AM to 5/28 2-3PM
Wet: 14
Span: 14		 42.8 None None None
Sat 5/29 38.2 60.2 49.2 0 5.69 100% 95% 0 -- -- -- -- --
Sun 5/30 39.6 70 54.8 0 5.69 100% 95% 0 -- -- -- -- --
Mon 5/31 41.6 72.4 57 0 5.69 100% 95% 0 -- -- -- -- --
Tue 6/1 50.1 77 63.6 0 5.69 100% 96% 0 -- -- -- -- --
Wed 6/2 50.6 70.3 60.4 0.21 5.9 100% 96% 1 6/2 6-7PM to 6/3 9-10AM
Wet: 16
Span: 16		 60.5 Moderate (Symptoms appear: 6/10) Moderate Yes
Thu 6/3 60 79.8 69.9 0.02 5.92 100% 96% 0 -- -- -- -- --
Fri 6/4 60.1 86.6 73.3 0 5.92 100% 97% 0 -- -- -- -- --
Sat 6/5 70.5 87 78.8 0 5.92 100% 97% 0 -- -- -- -- --
Sun 6/6 65.5 88.7 77.1 0 5.92 100% 97% 0 -- -- -- -- --
Mon 6/7 68.3 82.8 75.5 0.01 5.93 100% 98% 1 6/7 1-2PM to 6/7 1-2PM
Wet: 1
Span: 1		 79.8 None None None
Tue 6/8 67.2 85.9 76.6 0 5.93 100% 98% 0 -- -- -- -- --

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
About apple scab | About cherry leaf spot | About grape black rot
About these models | More weather data for this station