Ornamental Pathology - Botany and Plant Pathology, Purdue University

Ornamental Pathology Specialist

Janna Beckerman

Dr. Janna Beckerman

Professor of Plant Pathology
765.494.0363 (fax)

Program Description

Dr. Beckerman’s program in ornamental plant pathology focuses on research and extension to aid growers in the diagnosis and management of commercially important ornamental diseases in the nursery, greenhouse and landscape. 

Dr. Beckerman has developed (with Dr. Cliff Sadof, Entomology) a series of four apps, to assist homeowners in the diagnosis and management of trees, annuals, perennials and tomatoes. These apps work for both the iOS and Android platforms. For more information see www.purdueplantdoctor.com.

Purdue Annual Doctor app     Purdue perennial doctor app     Purdue tree doctor app


Ornamental Disease Management Links:

Purdue Plant Doctor - https://purdueplantdoctor.com

Illustrated Glossary of Plant Disease - https://www.extension.purdue.edu/extmedia/BP/BP-164-W.pdf

Fungicide Rotation for Nursery, Greenhouse, and Landscape Professionals - https://www.extension.purdue.edu/extmedia/BP/BP-71-W.pdf

Disease Management Strategies for Horticultural Crops: Fungicide Mobility for Nursery, Greenhouse, and Landscape Professionals - https://www.extension.purdue.edu/extmedia/BP/BP-70-W.pdf

Using Organic Fungicides - https://www.extension.purdue.edu/extmedia/BP/BP-69-W.pdf

Disease-resistant Annual and Perennial Production - https://www.extension.purdue.edu/extmedia/ID/ID-416-W.pdf

Purdue Landscape Report - https://www.purduelandscapereport.org


Specific Diseases and Disorders:

Downy Mildew - https://www.extension.purdue.edu/extmedia/BP/BP-68-W.pdf

Foliar Disease - https://www.extension.purdue.edu/extmedia/BP/BP-143-W.pdf

Juniper Rusts - https://www.extension.purdue.edu/extmedia/BP/BP-137-W.pdf

Powdery Mildew - https://www.extension.purdue.edu/extmedia/BP/BP-5-W.pdf

Phytophthora - https://www.extension.purdue.edu/extmedia/BP/BP-215-W.pdf

Rose Black Spot - https://www.extension.purdue.edu/extmedia/BP/BP-139-W.pdf

Apple Scab - https://www.extension.purdue.edu/extmedia/BP/BP-39-W.pdf

Root Rot in the Landscape - https://www.extension.purdue.edu/extmedia/BP/BP-206-W.pdf

Iron Chlorosis - https://www.extension.purdue.edu/extmedia/BP/BP-27-W.pdf

Pythium - https://www.extension.purdue.edu/extmedia/BP/BP-181-W.pdf

Salt Damage - https://www.extension.purdue.edu/extmedia/ID/ID-412-W.pdf