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  • MSU Extension
  • Michigan State University Ag Bio Research
  • Project Greeen

Linwood Grape Leaf Black Rot Report (Report issued 6/19/2013 7:39 )

Black rot model available after 4/15. Pre-bloom estimated as 6/5/2013 (800 DD Base 42 after 1/1).
Time period assessed for wetting events: 6/5 Midnight-1AM to 6/19/2013 6-7AM
No missing hourly data in this evaluation period.
Wet Period Station Start of wetting period End of wetting period Duration (Hrs.) Avg temp (F) Rainfall (in.) Grape Leaf Black Rot Progress toward infection
1 Linwood 6/10 5-6AM 6/11 8-9AM Wet: 28
Span: 28		 62 0.07 Yes 308%
2 Linwood 6/13 1-2AM 6/13 5-6AM Wet: 5
Span: 5		 61.4 0.03 None 56%
3 Linwood 6/13 7-8PM 6/14 3-4AM Wet: 4
Span: 9		 63.1 0.02 None 43%
4 Linwood 6/16 Midnight-1AM 6/16 8-9AM Wet: 9
Span: 9		 63.8 0.66 Yes 101%
5 Linwood 6/17 4-5AM 6/17 8-9PM Wet: 10
Span: 17		 63.8 0.15 Yes 112%

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