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

East Lansing (HTRC) Disease Report: Wetting events since 3/14 (Report issued 3/28/2024 6:30 )

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: 3/8 to 3/28/2024. Events between 3/14 and 3/28/2024 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 East Lansing (HTRC) 3/14 10-11AM 3/15 10-11AM Wet: 25
Span: 25
44.2 0.32 Light (Symptoms appear: 4/23) None. No risk until first bract leaves have expanded. No risk until pre-bloom period
2 East Lansing (HTRC) 3/17 4-5PM 3/17 4-5PM Wet: 1
Span: 1
31.9 0.01 None None. No risk until first bract leaves have expanded. No risk until pre-bloom period
3 East Lansing (HTRC) 3/23 4-5PM 3/23 9-10PM Wet: 4
Span: 6
29.9 0.05 None None. No risk until first bract leaves have expanded. No risk until pre-bloom period
4 East Lansing (HTRC) 3/24 11AM-Noon 3/24 Noon-1PM Wet: 2
Span: 2
31.5 0.03 None None. No risk until first bract leaves have expanded. No risk until pre-bloom period
5 East Lansing (HTRC) 3/26 4-5AM 3/26 6-7PM Wet: 9
Span: 15
51 0.33 None None. No risk until first bract leaves have expanded. No risk until pre-bloom period