McIntosh Tree stage: 
3/31/02 – green tip
4/13/02 – half inch green
4/15/02 – tight cluster
4/18/02 – pink
4/20/02 – bloom
5/6/02 – petal fall

Apple scab infection periods:
4/28/02 – We finally have our first apple scab infection period of the season. Starting 4/28/02 at 8:00AM and ending???? (About 48 hours later – 8:00AM 4/30
5/2/02 – Second infection period – estimating 24 hours at an average of 46 degrees
5/12/02 – Through 5/13/02. Our third infection period is by far the most significant. At least 50% of the primary season spores were released. We should be at the end of primary scab season within the week.
See Mills Table