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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
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: A Jones.
Pear Disease - Pear Leaf Spot Fungus - Articles Articles
The pear leaf spot fungus, Mycosphaerella pyri, infects the leaves of pear, quince, and occasionally apple trees. Numerous leaf spots can produce defoliation. More
Source: Edward Sikora, Auburn University, Bugwood.org
Strawberry Disease - Leaf Spots - Articles Articles
A wide array of leaf spots infect strawberries, including birds-eye leaf spot, black leaf spot, septoria leaf spot, cercospora leaf spot, alternaria leaf spot, red spot, and angular leaf spot. More
Photo by Kathy Demchak.
Strawberry Disease - Anthracnose - Articles Articles
Anthracnose, caused by species in the genus Colletotrichum, can manifest as a fruit rot, crown rot, and/or leaf spots, as well as lesions on petioles and runner stolons. 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
Leaf Spots in Strawberries in Home Fruit Plantings
Leaf Spots in Strawberries in Home Fruit Plantings - Articles Articles
A wide array of leaf spots infect strawberry species, including birds-eye leaf spot, black leaf spot, septoria leaf spot, cercospora leaf spot, alternaria leaf spot, red spot, and angular leaf spot. More
Anthracnose on Strawberries in Home Gardens
Anthracnose on Strawberries in Home Gardens - Articles Articles
Anthracnose is caused by several different species in the genus Colletotrichum. These fungi cause a fruit rot, crown rot, and/or leaf spots, as well as lesions on petioles and runner stolons. 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
Pear Leaf Spot in the Home Fruit Planting
Pear Leaf Spot in the Home Fruit Planting - Articles Articles
The pear leaf spot fungus, Mycosphaerella pyri, infects the leaves of pear, quince, and occasionally apple trees. Numerous leaf spots can produce defoliation. More
Leaf and Fruit Spot of Pear in Home Gardens
Leaf and Fruit Spot of Pear in Home Gardens - Articles Articles
Leaf blight and fruit spot are caused by the fungus Fabraea maculata, which infects the leaves, fruit, and shoots of pear and quince and the leaves of apple trees. 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
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