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

Chatham Disease Report: Wetting events since 3/14 (Report issued 3/28/2024 20:20 )

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).

Time period assessed for wetting events: 3/14 to 3/28/2024.
Hourly weather data missing for: 3/28/2024 5-6PM - 3/28/2024 7-8PM (3 hours); Total of 3 missing hours
Hourly weather data estimated for: 3/14/2024 Midnight-1AM - 3/28/2024 4-5PM (353 hours); Total of 353 estimated hours
Wet Period Station Start of wetting period End of wetting period Duration (Hrs.) Avg temp (F) Rainfall (in.) Apple Scab (leaf) Cherry Leaf Spot Grape Leaf Black Rot
1 Chatham 3/16 9-10PM 3/18 11PM - Midnight
Some estimated data used.
Wet: 24
Span: 27
24.3 0.65 None None. No risk until first bract leaves have expanded. No risk until pre-bloom period
2 Chatham 3/18 9-10AM 3/18 11AM-Noon
Some estimated data used.
Wet: 3
Span: 3
23.9 0.06 None None. No risk until first bract leaves have expanded. No risk until pre-bloom period
3 Chatham 3/19 Midnight-1AM 3/19 2-3AM
Some estimated data used.
Wet: 3
Span: 3
24.6 0.07 None None. No risk until first bract leaves have expanded. No risk until pre-bloom period
4 Chatham 3/19 4-5PM 3/20 11PM - Midnight
Some estimated data used.
Wet: 7
Span: 8
28 0.13 None None. No risk until first bract leaves have expanded. No risk until pre-bloom period
5 Chatham 3/20 8-9AM 3/20 3-4PM
Some estimated data used.
Wet: 2
Span: 8
17.6 0.03 None None. No risk until first bract leaves have expanded. No risk until pre-bloom period
6 Chatham 3/22 11AM-Noon 3/22 Noon-1PM
Some estimated data used.
Wet: 2
Span: 2
32 0.04 None None. No risk until first bract leaves have expanded. No risk until pre-bloom period
7 Chatham 3/22 9-10PM 3/23 8-9AM
Some estimated data used.
Wet: 6
Span: 12
18.5 0.08 None None. No risk until first bract leaves have expanded. No risk until pre-bloom period
8 Chatham 3/24 11AM-Noon 3/27 1-2AM
Some estimated data used.
Wet: 53
Span: 63
34 1.81 None None. No risk until first bract leaves have expanded. No risk until pre-bloom period
9 Chatham 3/28 Midnight-1AM 3/28 Midnight-1AM
Some estimated data used.
Wet: 1
Span: 1
26.1 0.01 None None. No risk until first bract leaves have expanded. No risk until pre-bloom period