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  • Michigan State University Extension
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North Central Disease Report: Most recent wetting event (Report issued 4/18/2024 12:47 )

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).

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 Time Period Assessed
Arlene 4/17 8-9AM Ongoing. Last hour with moisture: 4/18 8-9AM Wet: 21
Span: 25		 47.8 0.23 Light (Symptoms appear: 5/15) None No risk until pre-bloom period Most recent period shown: 4/11 11PM - Midnight to 4/18/2024 10-11AM
Gaylord 4/16 11PM - Midnight Ongoing. Last hour with moisture: 4/18 9-10AM Wet: 31
Span: 35		 43.5 0.49 Moderate (Symptoms appear: 5/18) None No risk until pre-bloom period Most recent period shown: 4/11 11PM - Midnight to 4/18/2024 10-11AM
Kalkaska 4/16 11PM - Midnight Ongoing. Last hour with moisture: 4/18 6-7AM Wet: 26
Span: 32		 46.4 0.28 Moderate (Symptoms appear: 5/14) None No risk until pre-bloom period Most recent period shown: 4/11 11PM - Midnight to 4/18/2024 10-11AM
McBain 4/17 Midnight-1AM Ongoing. Last hour with moisture: 4/18 5-6AM Wet: 23
Span: 30		 48.4 0.38 Moderate (Symptoms appear: 5/14) None No risk until pre-bloom period Most recent period shown: 4/11 11PM - Midnight to 4/18/2024 10-11AM

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