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

Hartford Disease Report: Wetting events since 5/7 (Report issued 4/26/2024 12:00 )

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: 4/12 to 5/21/2018. Events between 5/7 and 5/21/2018 shown.


Select leaf wetness sensor for analysis:
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 Hartford 5/9 11AM-Noon 5/10 11AM-Noon Wet: 10
Span: 25		 61.9 0.58 Light (Symptoms appear: 5/21) Low No risk until pre-bloom period
2 Hartford 5/11 9-10AM 5/13 9-10AM Wet: 39
Span: 49		 47.6 0.98 Heavy (Symptoms appear: 5/23) Moderate No risk until pre-bloom period
3 Hartford 5/14 4-5AM 5/15 10-11AM Wet: 24
Span: 31		 61.4 1.41 Heavy (Symptoms appear: 5/25) High No risk until pre-bloom period
4 Hartford 5/18 7-8PM 5/19 2-3PM Wet: 18
Span: 20		 59.9 0.29 Moderate (Symptoms appear: 5/28) Moderate No risk until pre-bloom period
5 Hartford 5/20 10-11AM Ongoing. Last hour with moisture: 5/22 11PM - Midnight Wet: 30
Span: 38		 56.7 0.86 Heavy (Symptoms appear: 5/29) High No risk until pre-bloom period

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