Diseases

PSU County Extension Offices - To make sure you do not waste your time and money treating the wrong pest, call your county office for free pest ID services, gardening tips/handouts, and expert advice

Home and Garden Information Center Plant Diagnostics - Diagnose your plant pest problems online with photos and management principles based on IPM, from University of Maryland.

Roses in the Garden and Landscape: Diseases and Abiotic Disorders (PDF) - Fact sheet from Univ.California Davis IPM

Plant Pathology Department Disease fact sheets - Disease information for many landscape plants, shrubs & trees

Sudden Oak Death - Forest Service pest alert on a new fungus that kills a number of different tree species

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