Rhode Island Apple IPM

1999 - Current pest report - Apple scab infection periods

Tree stage for McIntosh:
4/6/99 - green tip
4/8/99 - half inch green
4/16/99 - nearly tight cluster
4/21/99 - tight cluster
4/26/99 - loose cluster
5/1/99 - pink
5/5/99 - early bloom
5/6/99 - full bloom
5/11/99 - late bloom
5/13/99 - McIntosh petal fall

End of primary apple scab season with 5/20/99 wetting period

Apple scab infection periods:

Fourth infection period: 5/18/99 through 5/20/99
Third infection period: 5/8/99
Second infection period: 5/3/99 through 5/5/99
First infection period: 4/22/99 through 4/23/99

Lesions in unsprayed trees 5/20/99. Probably from May 3-5 infection period.