Penn State College of Agricultural Sciences Department of Plant Pathology





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The Pennsylvania State University
Cooperative Extension

Gary W. Moorman
Professor of Plant Pathology


This is a listing of fact sheets available on common diseases of plants frequently grown in greenhouses, interiorscapes, and in outdoor landscapes and nurseries in the northeastern U.S. Since many other diseases and disorders are known to occur and new diseases are recorded frequently, this compilation should not be considered complete. The main purpose of this publication is to provide information helpful in the diagnosis of diseases and to give some indication of what measures must be taken to manage the problem. All files are in PDF format, unless otherwise noted.

Notas sobre Enfermedades de Plantas en español

General Information Floral and Foliage Plants Woody Ornamental


General Information

Assessing the Threat of Disease in Greenhouses
Assessing the Threat of Disease in Nurseries
Bacterial Diseases of Ornamental Plants
Bacterial Wilt (Ralstonia solanacearum)
Bedding Plant Diseases
Biological Control of Plant Diseases in the Greenhouse
Black Root Rot (Thielaviopsis)
Botrytis
Cucumber Mosaic Virus
Cylindrocladium
Damping-Off
Diagnosing Poor Plant Health
Disinfesting Tools and Equipment
Downy Mildew
Fungal Root Rots and Fungicide Use
Fungicide Resistance
Heat Treatments to Control Soil-borne Pests
Inspecting Trees for Hazards
Key Interior Plants and Key Diseases Indoors
Key Plants and Key Diseases Outdoors
Over-fertilization of Potted Plants
Phytotoxicity
Powdery Mildew
Pythium Root Rot
Reference Material for Floricultural Crop Diseases
References for Arborists, Nurserymen, and Landscape Maintenance Workers
Rhizoctonia
Sources of Plant Disease (Greenhouse Production)
Sources of Plant Pathogens (Nursery Production)
Tobacco Mosaic Virus (TMV)
Virus Diseases
Weigh it Before You Spray It
What is Growing in my Mulch? (Molds and Fungus)


Floral and Foliage Plants

African Violet
Aglaonema
Aster
Bacterial Blight of Geraniums
Begonia
Calceolaria
Carnation
Catharanthus (Vinca)

Christmas Cactus
Chrysanthemum
Cineraria (Senecio)
Cordyline (Ti Plant)
Crassula (Jade Plant)
Cyclamen
Dahlia
Daylily (Hemerocallis)
Delphinium
Dieffenbachia
Dracaena
Easter Lily
Edema of Geraniums
English Ivy (Hedera)
Exacum
Fern
Ficus
Foliar Nematodes
Fuchsia
Gazania
Geranium
Gerbera
Gladiolus
Gloxinia
Grape Ivy (Cissus)
Gypsophila
Hydrangea
Impatiens
Impatiens Necrotic Spot Virus
Iris (bulbous and rhizomatous)

Kalenchöe
Maranta
Marigold
Narcissus
Norfolk Island Pine Diseases
Palm
Pansy
Petunia
Philodendron
Poinsettia
Pothos
Primula
Schefflera
Snapdragon
Spathiphyllum
Statice
Syngonium
Tulip
Verbena
Zinnia


Woody Ornamental

Abiotic Diseases of Woody Ornamentals
Amelanchier (Shadbush, Serviceberry)
Anthracnose on Shade Trees
Arborvitae
Armillaria Root Rot
Ash
Azalea/Rhododendron
Bacterial Leaf Scorch
Bacterial Wetwood or Slime Flux
Beech
Black Knot
Boston Ivy (Parthenocissus) Disease
Boston Ivy Leaf Spot
Botryosphaeria Canker
Boxwood
Canker Stain in Sycamore and London Plane Tree
Cankers of Hardwood Trees
Catalpa
Cedar-Apple and Related Rusts on Ornamentals
Cherry
Chestnut
Cotoneaster
Crabapple
Crown Gall
Cytospora Canker on Spruce
Dogwood Decline
Dogwood
Douglas-Fir
Elm
English Ivy (Hedera)
Euonymus
Eutypella Canker on Maple
Fire Blight on Woody Ornamentals
Forsythia
Grape Ivy (Cissus)
Hackberry
Hawthorn
Hemlock
Hickory
Holly
Honeysuckle
Horse Chestnut
Juniper
Juniper Twig Blight
Leucothoe
Lilac
Maple
Mountain Ash
Mountain Laurel
Nectria Canker
Needlecasts
Nematode-caused Diseases on Woody Ornamentals
Oak
Oak Leaf Blister
Oak Wilt
Pachysandra
Phytophthora Root Rot on Woody Ornamentals
Pieris
Pine
Plum Pox Virus (PPV)
Poplar
Privet
Pseudomonas Syringae
Pyracantha
Redbud
Root Death of Woody Ornamentals and Its Diagnosis
Rose Black Spot
Rose
Scheduling Woody Ornamental Plant Disease Management Practices
Sphaeropsis (Diplodia) Tip Blight
Spruce
Sycamore
Taxus (Yew)
Tree Diseases That Create Hazards
Tulip Poplar
Tulip Tree
Verticillium Wilt of Woody Ornamentals
Viburnum
Vinca
Walnut Anthracnose
Willow


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Last modified Friday, June 8, 2007

 

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