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

Coldwater Disease Report: Wetting events since 4/4 (Report issued 4/18/2024 14:04 )

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).

Time period assessed for wetting events: 3/4 to 4/18/2024. Events between 4/4 and 4/18/2024 shown.


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 Coldwater 4/1 6-7PM 4/5 7-8AM Wet: 67
Span: 86		 39.7 0.93 Heavy (Symptoms appear: 4/19) None. No risk until first bract leaves have expanded. No risk until pre-bloom period
2 Coldwater 4/7 8-9PM 4/8 Midnight-1AM Wet: 4
Span: 5		 45.6 0.07 None None No risk until pre-bloom period
3 Coldwater 4/11 Midnight-1AM 4/12 11AM-Noon Wet: 36
Span: 36		 47.2 1.1 Heavy (Symptoms appear: 4/29) Moderate No risk until pre-bloom period
4 Coldwater 4/17 Midnight-1AM 4/17 3-4PM Wet: 12
Span: 16		 57.5 0.26 Light (Symptoms appear: 5/7) Low No risk until pre-bloom period

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