Apple Scab Venturia inaequalis

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I. Introduction: Apple scab is of major economic importance in the mid-Atlantic region. If not controlled, the disease can cause extensive losses (70 percent or greater) where humid, cool weather occurs during the spring months. Losses result directly from fruit or pedicel infections, or indirectly from repeated defoliation which can reduce tree growth and yield.

Online References

Ellis, M. A., Chatfield, J., and Draper, E. 1997. Scab of Apple and Crabapple. The Ohio State University Extension Factsheet HYG-3003-94.

Ritchie, D. F., Sutton, T. B., and Sorensen, K. A. 1997. Disease and Insect Management in the Home Orchard. North Carolina State University Cooperative Extension.

Teviotdale,B. L., and Gubler, W. D. 1997. Apple Scab. UC Pest Management Guidelines, University of California Statewide Integrated Pest Management Project.

Text prepared by A.R. Biggs and K.D. Hickey