See All Pest, Disease and Weed Identification

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Rust Diseases of Apple in the Home Fruit Planting
Rust Diseases of Apple in the Home Fruit Planting - Articles Articles
Cedar-apple rust, hawthorn rust, and quince rust spend part of their life cycle on the eastern red cedar and are problems only when red cedar is found close to the orchard. More
Penn State Department of Plant Pathology & Environmental Microbiology Archives, Penn State, Bugwood.org
Rust Diseases of Brambles in the Home Fruit Planting - Articles Articles
Orange rust is a fungal disease that occurs only on brambles, particularly blackberries, dewberries, and black raspberries. More
Cedar-quince rust on juniper
Cedar Apple And Related Rusts on Ornamentals - Articles Articles
Cedar-apple rust and closely related diseases, cedar-quince, cedar-hawthorn, and Japanese apple rusts are caused by fungi of the genus Gymnosporangium. More
Left: gray mold; right: anthracnose fruit rot.
Strawberry 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
Protect tart cherries during bloom to prevent cherry leaf spot infection.
Tree Fruit Diseases To Manage During The Month of May - 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
Apple rust mites. Photo: David Biddinger
Apple Rust Mite - Articles Articles

Apple Rust Mite

Grzegorz (Greg) Krawczyk, Ph.D.

Apple rust mite, Aculus schlechtendali, is commonly found, but is rarely an important pest of apple in Pennsylvania. More
Blister mites become active at bud break, migrate to the tender, new leaves, and burrow beneath the epidermis of the undersides of leaves to feed. This results in a gall, or blister, in which the eggs are laid. Photo by G. Krawczyk.
Pear Blister Mite and Pear Rust Mite - Articles Articles

Pear Blister Mite and Pear Rust Mite

Grzegorz (Greg) Krawczyk, Ph.D.

Pearleaf blister mite, Phytoptus pyri, and pear rust mite, Epitrimerus pyri, are similar species, virtually invisible to the naked eye, that often are common on unsprayed trees. More
On leaves, cedar-apple rust first appears as small, pale yellow spots on the upper surfaces. The spots enlarge to about 1∕8 inch in diameter. Photo by K. Peter.
Rust Diseases of Apple - Articles Articles

Rust Diseases of Apple

Kari A. Peter, Ph.D.

There are three rust diseases: cedar-apple rust, hawthorn rust, and quince rust. The most common is cedar-apple rust. More
Rusty Spot of Peach in the Home Garden
Rusty Spot of Peach in the Home Garden - Articles Articles
Rusty spot of peach is characterized by the presence of rust-colored spots that can cover the entire surface of the fruit. More
Sandra Jensen, Cornell University, Bugwood.org
Late Leaf Rust of Brambles in Home Fruit Plantings - Articles Articles
Late leaf rust can be a problem on fall-bearing raspberries. More
Florida Division of Plant Industry , Florida Department of Agriculture and Consumer Services, Bugwood.org
Cereal Rust Mite - Articles Articles
How to scout and manage cereal rust mite. More
N.S. Luepschen, Bugwood.org
Home Gardening: Rusty Spot of Peach - Articles Articles
Rusty spot of peach is characterized by the presence of rust-colored spots that can cover the entire surface of the fruit. More
Upper surface of affected shrub rose showing round leaf spots with an orange center on yellowing leaves. Image: R. Benner, Penn State
Rose Rust in the Landscape - Articles Articles
Rose Rust is uncommon on ornamental roses in Pennsylvania but it does occur, especially in mild, wet spring conditions. More
Photo 1. Early symptom of orange rust. Photo: K. Demchak
Managing Orange Rust in a Bramble Planting - Articles Articles
Orange rust is a systemic disease, any plants propagated from infected plants will also be infected. 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
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