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

Linwood Grape Leaf Black Rot Report (Report issued 4/23/2014 11:39 )

Black rot model available after 4/15. Pre-bloom not reached. Using 6/1/2014 as a default date.
Time period assessed for wetting events: 4/9 3-4AM to 4/23/2014 10-11AM
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 4/10 2-3PM 4/10 2-3PM Wet: 1
Span: 1
58 0.01 No risk until pre-bloom period 8%
2 Linwood 4/12 5-6PM 4/14 9-10AM Wet: 33
Span: 41
48.6 2.66 No risk until pre-bloom period 76%
3 Linwood 4/15 11AM-Noon 4/15 5-6PM Wet: 3
Span: 7
29.3 0.04 No risk until pre-bloom period 0%
4 Linwood 4/21 6-7PM 4/22 3-4AM Wet: 10
Span: 10
57.8 0.17 No risk until pre-bloom period 81%