Plant Disease Identification and Control

Information on plant disease identification and control, including rot, freeze damage, rust, blight, mold, scales, bacteria, viruses, fungus, wilt, mildew, gall, mites, moths and cankers. Tips on integrated pest management and herbicide summaries.

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Rose Diseases (Greenhouse)
Rose Diseases (Greenhouse) - Articles Articles
Informational table showing disease name, symptoms, pathogen/cause, and management of Rose Diseases (Greenhouse) diseases. More
Redbud Diseases
Redbud Diseases - Articles Articles

Redbud Diseases

Gary W. Moorman, Ph.D.

Informational table showing disease name, symptoms, pathogen/cause, and management of Redbud diseases. More
Privet Diseases
Privet Diseases - Articles Articles

Privet Diseases

Gary W. Moorman, Ph.D.

Informational table showing disease name, symptoms, pathogen/cause, and management of Privet diseases. More
Pothos Diseases
Pothos Diseases - Articles Articles
Informational table showing disease name, symptoms, pathogen/cause, and management of Pothos diseases. More
Poplar Diseases
Poplar Diseases - Articles Articles

Poplar Diseases

Gary W. Moorman, Ph.D.

Informational table showing disease name, symptoms, pathogen/cause, and management of Poplar diseases. More
Poinsettia Diseases
Poinsettia Diseases - Articles Articles
Informational table showing disease name, symptoms, pathogen/cause, and management of Poinsettia diseases. More
Pine Diseases
Pine Diseases - Articles Articles

Pine Diseases

Gary W. Moorman, Ph.D.

Informational table showing disease name, symptoms, pathogen/cause, and management of Pine diseases. More
Philodendron Diseases
Philodendron Diseases - Articles Articles

Philodendron Diseases

Gary W. Moorman, Ph.D.

Informational table showing disease name, symptoms, pathogen/cause, and management of Philodendron diseases. More
Petunia Diseases
Petunia Diseases - Articles Articles

Petunia Diseases

Gary W. Moorman, Ph.D.

Informational table showing disease name, symptoms, pathogen/cause, and management of Petunia diseases. More
Peony Diseases
Peony Diseases - Articles Articles
Informational table showing disease name, symptoms, pathogen/cause, and management of Peony diseases. More
Pansy Diseases
Pansy Diseases - Articles Articles

Pansy Diseases

Gary W. Moorman, Ph.D.

Informational table showing disease name, symptoms, pathogen/cause, and management of Pansy diseases. More
Palm Diseases
Palm Diseases - Articles Articles

Palm Diseases

Gary W. Moorman, Ph.D.

Informational table showing disease name, symptoms, pathogen/cause, and management of Palm diseases. More
Pachysandra Diseases
Pachysandra Diseases - Articles Articles

Pachysandra Diseases

Gary W. Moorman, Ph.D.

Informational table showing disease name, symptoms, pathogen/cause, and management of Pachysandra diseases. More
Impatiens, Downy Mildew - sporulation closeup, photo: Gary Moorman
Overview of Plant Diagnostics - Articles Articles
Getting to the bottom of a plant problem can be a challenge. More
Oak Wilt
Oak Wilt - Articles Articles

Oak Wilt

Gary W. Moorman, Ph.D.

Oak wilt occurs west of the Susquehanna River in Pennsylvania. More
Oak Leaf Blister
Oak Leaf Blister - Articles Articles

Oak Leaf Blister

Gary W. Moorman, Ph.D.

Oak leaf blister, caused by the fungus Taphrina caerulescens, occurs on most species of oaks. More
Oak Diseases
Oak Diseases - Articles Articles

Oak Diseases

Gary W. Moorman, Ph.D.

Informational table showing disease name, symptoms, pathogen/cause, and management of Oak diseases. More
Norfolk Island Pine Diseases
Norfolk Island Pine Diseases - Articles Articles

Norfolk Island Pine Diseases

Gary W. Moorman, Ph.D.

Informational table showing disease name, symptoms, pathogen/cause, and management of Norfolk Island Pine diseases. More
Nematode eggs.
Nematode-caused Diseases On Woody Ornamentals - Articles Articles
Nematodes are soil-dwelling non-segmented roundworms, usually less than 0.5 mm (0.02 in.) long. More
Nectria fruiting on a twig
Nectria Canker - Articles Articles

Nectria Canker

Gary W. Moorman, Ph.D.

The fungus Nectria invades wood damaged by freezing, hail, animals and insects. More
Mountain Laurel Diseases
Mountain Laurel Diseases - Articles Articles

Mountain Laurel Diseases

Gary W. Moorman, Ph.D.

Informational table showing disease name, symptoms, pathogen/cause, and management of Mountain Laurel diseases. More
Needlecast Diseases
Needlecast Diseases - Articles Articles

Needlecast Diseases

Gary W. Moorman, Ph.D.

Needlecast diseases of evergreens are caused by several fungi. More
Narcissus Diseases
Narcissus Diseases - Articles Articles

Narcissus Diseases

Gary W. Moorman, Ph.D.

Informational table showing disease name, symptoms, pathogen/cause, and management of Narcissus diseases. More
Mountain Ash Diseases
Mountain Ash Diseases - Articles Articles

Mountain Ash Diseases

Gary W. Moorman, Ph.D.

Informational table showing disease name, symptoms, pathogen/cause, and management of Mountain Ash diseases. More
Marigold Diseases
Marigold Diseases - Articles Articles

Marigold Diseases

Gary W. Moorman, Ph.D.

Informational table showing disease name, symptoms, pathogen/cause, and management of Marigold diseases. More