Rhode Island Apple IPM
2000 - Current pest report - Apple scab infection
3/27/2000 - green tip
4/7/2000 - half inch green
4/14/2000 - tight cluster
5/1/2000 - pink
5/4/2000 - early bloom
5/8/2000 - early petal fall
5/10/2000 - petal fall
*See apple scab lesions in commercial orchard - 5/8/2000
*See apple scab lesions in 3 commercial orchards - 5/11/2000
Apple scab infection periods:
4/8/2000 - 4/9/2000 :
slight infection period, not significant unless had abundant scab in 1999.
4/15/2000 - 4/16/2000 : first significant
scab infection period!!!
4/16/2000 - 4/19/2000 : off and on wet weather causing infection
4/21/2000 - 4/23/2000 : another significant scab infection period
last two wet periods have not caused apple scab infection periods (4/26-4/27
5/5/2000 - 5/8/2000 : scattered showers causing
some apple scab infection periods in many locations.
5/10/2000 : apple scab infection period
5/13/2000 : area wide apple scab infection period. Nearing the
end of primary scab season. 90% of ascospores should be mature
5/18/2000 - 5/20/2000 : apple scab infection period; next week
should end primary scab season. The real problem now is secondary scab
spreading in orchards. I see apple scab lesions in many orchards!
5/22/2000 - I think primary apple scab season is over. But, our
trouble with scab is not over. I see scab in more orchards than ever before.
See lesions on fruit too.
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