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Japanese beetle damage on rose foliage. Photo credit: Lois Miklas
Simple Strategies to Deal with Garden Pests, Diseases - Articles Articles
You can create a relatively pest and disease free garden if you believe that ‘perfect’ plants are not the absolute goal of gardening and that all insects are not out to get you. More
Protect tart cherries during bloom to prevent cherry leaf spot infection.
Tree Fruit Diseases - Spring Control Strategies - Articles Articles
May is the battleground month for disease management: be on alert for apple scab, fire blight, powdery mildew, rust, cherry leaf spot, brown rot, and bacterial spot infection conditions. More
Brown rot can cause shoot blight. (Photo: K. Peter)
Tree Fruit Diseases - Brown Rot, Fire Blight, Root Rots - Articles Articles
With peach season in full swing, mid-season management strategies are reviewed. More
Left: gray mold; right: anthracnose fruit rot.
Strawberry Disease - Fruit Rot Protection Begins at Bloom - Articles Articles
Our two main targets for bloom time protection of strawberries are gray mold/ Botrytis fruit rot, and, if you are growing susceptible varieties like Chandler, anthracnose fruit rot. More
Rusty spot is recognized only on the fruit. The earliest symptoms on young green fruit appear as small, orange-tan spots. K. Peter.
Peach Disease - Rusty Spot - Articles Articles

Peach Disease - Rusty Spot

Kari A. Peter, Ph.D.

Minor issue in Pennsylvania and is caused by the same fungus as apple powdery mildew. Loring is a susceptible variety. More
Blueberry Disease - Powdery Mildew, Not Symptoms You’d Expect
Blueberry Disease - Powdery Mildew, Not Symptoms You’d Expect - Articles Articles
Powdery mildew, a warm-weather high-humidity disease, is present in some blueberry plantings. Lowbush, highbush, and rabbiteye blueberries are all affected. More
Source: William M. Brown Jr., Bugwood.org
Peach Disease - Powdery Mildew of Peach, Nectarine, and Apricot - Articles Articles
Powdery mildew, Sphaerotheca pannosa, sometimes called rose mildew (it affects some woody ornamentals), is not often serious. More
Source: Bruce Watt, University of Maine, Bugwood.org
Stone Fruit Disease - Powdery Mildew of Cherry and Plum - Articles Articles
The disease is caused by Podosphaeria oxyacanthae, one of the common species of the powdery mildew group of fungi. More
On leaves of new shoot growth symptoms of powdery mildew are feltlike, white patches on the margins and lower surfaces. Infected leaves curl upward and soon become covered with a powdery coating of spores. Photo by K. Peter.
Apple Disease - Powdery Mildew - Articles Articles

Apple Disease - Powdery Mildew

Kari A. Peter, Ph.D.

Powdery mildew, caused by the fungus Podosphaera leucotricha, attacks buds, blossoms, leaves, new shoots, and fruit of wild and cultivated apples and crabapples. More
Photo by Kathy Demchak.
Strawberry Disease - Powdery Mildew - Articles Articles
Powdery mildew, Sphaerotheca macularis, occurs on a wide range of hosts and almost everywhere the strawberry is grown. More
Source: Bugwood.org
Tree Fruit Disease - Phytophthora Collar, Crown and Root Rots - Articles Articles
Phytophthora collar, crown, and root rots, Phytophthora cactorum, continue to be a major cause of tree death in Pennsylvania orchards. These rots can affect both pome and stone fruit. More
Downy mildew on pumpkin. Photo: Beth K. Gugino, Penn State
Vegetable Disease Updates: August 30, 2017 - Articles Articles
Within the past week, there have been three separate reports of downy mildew on jack-o-lantern pumpkin in eastern Virginia. More
Figure 1. Drain plugs must be sealed. Photo: PA Mushroom IPM Handbook
IPM in Mushroom Production: Exclusion Techniques for Pest Control - Articles Articles

IPM in Mushroom Production: Exclusion Techniques for Pest Control

Maria Gorgo-Gourovitch, David Meigs Beyer, Ph.D., John A. Pecchia, Ph.D.

Exclusion prevents the entrance of pest organisms into new rooms and their escape from older ones. The latter should not be underestimated. More
Red thread disease, Corticium fuciforme, on perennial ryegrass. Courtesy of C. J. O'Rourke.
Diseases of Forage Grasses in Humid Temperate Zones - Articles Articles
Forage grasses are subject to a multitude of leaf, stem, floral, and root diseases. More
Disease Descriptions for Gooseberries and Currants
Disease Descriptions for Gooseberries and Currants - Articles Articles
The more common diseases found on currants and gooseberries are anthracnose, leaf spot, and powdery mildew. The most common virus disease is currant mosaic. More
Powdery Mildew of Strawberries in Home Fruit Plantings
Powdery Mildew of Strawberries in Home Fruit Plantings - Articles Articles
Powdery mildew is observed mostly as a foliage disease, but it occasionally causes a serious fruit rot. Severe foliar infection can damage leaves and reduce photosynthesis. More
Crassula (Jade Plant) Diseases
Crassula (Jade Plant) Diseases - Articles Articles

Crassula (Jade Plant) Diseases

Gary W. Moorman, Ph.D.

Informational table showing disease name, symptoms, pathogen/cause, and management of Crassula (Jade Plant) diseases. More
Powdery Mildew of Peach, Nectarine, and Apricot in Home Fruit Plantings
Powdery Mildew of Peach, Nectarine, and Apricot in Home Fruit Plantings - Articles Articles
Powdery mildew, sometimes called "rose mildew" can attack leaves, twigs, and fruit. More
Powdery Mildew of Cherry and Plum in Home Fruit Plantings
Powdery Mildew of Cherry and Plum in Home Fruit Plantings - Articles Articles
This disease is caused by Podosphaera clandestina, one of the common species of the powdery mildew group of fungi. More
Powdery Mildew of Apple in the Home Fruit Planting
Powdery Mildew of Apple in the Home Fruit Planting - Articles Articles
Powdery mildew attacks buds, blossoms, leaves, new shoots, and fruit of apples and and reduces shoot growth and fruit set, and produces a netlike russet on the fruit of some varieties. More
Fig. 1. Brown stripe on orchardgrass
Diseases in Orchardgrass - Articles Articles

Diseases in Orchardgrass

Marvin Hall, Ph.D.

Major diseases of orchardgrass in our area has no quick fix yet, but fertility management helps. More
Powdery mildew on Poinsettia
Powdery Mildew - Articles Articles

Powdery Mildew

Gary W. Moorman, Ph.D.

Powdery mildew occurs on many different flowers, woody ornamentals and trees. More
Cross-wall near base of branch
Rhizoctonia - Articles Articles

Rhizoctonia

Gary W. Moorman, Ph.D.

Rhizoctonia, a soil-borne fungus, is known to cause root rots, stem rots, damping-off and, in some cases, a blight of leaves. More
Container Grown Cucumbers, Zucchini and Squash
Container Grown Cucumbers, Zucchini and Squash - Articles Articles

Container Grown Cucumbers, Zucchini and Squash

Tom Butzler, Thomas Maloney, Darryl Dressler

This article, coupled with the advice in "Growing Great Container Vegetables #1: General Recommendations", will get you growing great cucumbers and squash. More
Paul Bachi, University of Kentucky Research and Education Center, Bugwood.org
Fungal Root Rots And Chemical Fungicide Use - Articles Articles
Root rots of floricultural and woody ornamental crops are one of the most important causes of crop loss. More
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