Marsha Ann Tate 222 Buckhout Laboratory University Park, PA 16802 Phone: 814-865-7736 Email: mat1@psu.edu
Abiotic Diseases on Woody Ornamentals
African Violet Diseases
Aglaonema Diseases
Amelanchier (Shadbush, Serviceberry) Diseases
Anthracnose (of Brambles)
Anthracnose on Shade Trees
Apple Scab
Arborvitae Diseases
Armillaria Root Rot
Ash Diseases
Aster Diseases
Azalea/Rhododendron Diseases
Bacterial Blight of Geraniums
Bacterial Diseases of Ornamental Plants
Bacterial Leaf Scorch
Beech Diseases
Bedding Plant Diseases
Begonia Diseases
Bitter Rot
Black Knot of Plum and Cherry
Black Rot (of Apples) Black Rot (of Grapes)
Black Root Rot (of Strawberries)
Black Root Rot - Thielaviopsis
Blue Mold (of Apples)
Boston Ivy (Parthenocissus) Leaf Spot
Botryosphaeria Canker
Botrytis
Botrytis Bunch Rot (of Grapes)
Botrytis Fruit Rot (of Brambles)
Boxwood Diseases
Brooks Fruit Spot
Calceolaria Diseases
Canker stain on Sycamore
Cankers of Hardwood Trees
Carnation Diseases
Catalpa Diseases
Cedar-Apple Rust
Cherry Diseases
Chestnut Diseases
Christmas Cactus Diseases
Chrysanthemum Diseases
Cineraria (Senecio) Diseases
Cordyline (Ti Plant) Diseases
Cotoneaster Diseases
Crabapple Diseases
Crassula (Jade Plant) Diseases
Crown and Cane Gall (of Brambles)
Crown and Collar Rot
Crown Gall
Crown Gall (of Apples)
Crown Gall (of Grapes)
Cyclamen Diseases
Cylindrocladium
Cytospora Canker
Top of Page
Dahlia Diseases
Damping-Off
Daylily (Hemerocallis) Diseases
Delphinium Diseases
Diagnosis of Poor Plant Health
Dieffenbachia Diseases
Diplodia Tip Blight
Disinfesting Tools and Equipment
Dogwood Decline
Dogwood Diseases
Douglas-Fir Diseases
Downy Mildew
Dracaena Diseases
Easter Lily Diseases
Edema of Geraniums
Elm Diseases
English Ivy (Hedera) Diseases
Euonymus Diseases
Eutypa Dieback (of Grapes)
Eutypella Canker on Maple
Exacum Diseases
Fabraea Leaf and Fruit Spot of Pear
Fern Diseases
Ficus Diseases
Fire Blight (Fruit Pathology Fact Sheet)
Fire Blight of Pear
Fire Blight on Woody Ornamentals
Forsythia Diseases
Fungal Root Rots and Fungicide Use
Fuchsia Diseases
Geranium Diseases
Gerbera Diseases
Gladiolus Diseases
Gloxinia Diseases
Grape Ivy (Cissus) Diseases
Gray Mold (of Strawberries)
Gypsophila Diseases
Hackberry Diseases
Hawthorn Diseases
Hemlock Diseases
Hickory Diseases
Holly Diseases
Honeysuckle Diseases
Horse Chestnut Diseases
Hydrangea Diseases
Impatiens Diseases
Impatiens Necrotic Spot/Tomato Spotted Wilt Virus
Iris (bulbous and rhizomatous) Diseases Top of Page
Juniper Diseases
Juniper Twig Blight
Kalanchoe Diseases
Key Interior Plants and Key Diseases
Key Plants and Key Diseases: Outdoors
Leaf Spots (on Strawberries)
Leather Rot (of Strawberries)
Leucothoe Diseases
Lilac Diseases
Maple Diseases
Maranta Diseases
Marigold Diseases
Mountain Ash Diseases
Mountain Laurel Diseases
Mucor Rot
Narcissus Diseases
Nectria Canker
Nectria Twig Blight
Needlecasts
Nematode on Woody Ornamentals
Norfolk Island Pine Diseases
Oak Diseases
Oak Leaf Blister
Oak Wilt
Orange Rust (of Brambles)
Overfertilization
Pachysandra Diseases
Palm Diseases
Pansy Diseases
Pear Scab
Petunia Diseases
Philodendron Diseases
Phomopsis Cane, Leaf Spot and Fruit Rot (of Grapes)
Phomopsis Twig Blight and Canker (of Blueberries)
Phytophthora Root Rot
Phytophthora Root Rot (of Brambles)
Phytotoxicity
Pieris Diseases
Pine Diseases
Plum Pox Virus (PPV)
Poinsettia Diseases
Poplar Diseases
Pothos Diseases
Powdery Mildew
Powdery Mildew (of Apples) Powdery Mildew (of Brambles)
Powdery Mildew (of Grapes)
Primula Diseases
Privet Diseases
Pyracantha Diseases
Pythium Root Rot
Red Stele (of Strawberries)
Redbud Diseases
References for Arborists, Nurserymen, and Landscape Maintenance Workers
Rhizoctonia
Root Death of Woody Ornamentals and Its Diagnosis
Rose Black Spot
Rose Diseases
Rust Diseases Top of Page
Scheduling Woody Ornamental Plant Disease Management Practices
Schefflera Diseases
Snapdragon Diseases Soil Treatments to Control Soil-Borne Pests
Sooty Blotch and Flyspeck
Sources of Plant Diseases
Spathiphyllum Diseases
Spruce Diseases
Statice Diseases
Sycamore Diseases
Syngonium Diseases
Taxus (Yew) Diseases
Tree Diseases That Create Hazards Tulip Diseases
Tulip Tree Diseases
Union Necrosis & Decline
Verbena Diseases
Verticillium Wilt of Woody Ornamentals
Viburnum Diseases
Vinca Diseases
Virus Diseases
Virus Diseases of Brambles
Walnut Diseases
Weigh it Before You Spray It
What is Growing in my Mulch? (Molds and Fungus)
White Rot
Willow Diseases
Zinnia Diseases
