See All Pest, Disease and Weed Identification

Explore science-based strategies for identifying and managing scale insects, including treatment timing, pesticide use, and integrated pest management tactics.

Learn the distinguishing characteristics to help you accurately identify the invasive autumn olive (Elaeagnus umbellata) shrub.

Horse owners should manage catsear presence in pastures and limit their horses' contact with the plant.

Multicolored Asian lady beetles are native to Asia but have been introduced around the world. While they can be beneficial predators, they are displacing native lady beetle species and are fall invading home pests.

Protect ornamental and vegetable crops by learning to identify Thrips parvispinus, recognize its damage, and apply effective monitoring and IPM strategies.

German yellowjackets are invasive, pestiferous wasps that frequently build nests in and around human structures.

The eastern yellowjacket is a ground nesting species found throughout most of the eastern United States. It is common in woodlands, pastures, parks and lawns.

Identification and life history of external parasites of Pennsylvania deer, including blacklegged ticks, winter ticks, and deer keds.

Yellow-legged hornets are native to Southeast Asia. A worker was found in Georgia (USA) in August 2023, the first time this species has been reported from North America.

The sawtoothed grain beetle, and the closely related merchant grain beetle, can be found with other insects in contaminated stored grains in Pennsylvania.

The oak leaf itch mite, thought to have originated in Europe, has been recorded from Australia, India, Egypt, Chile and most recently, the United States.

The European fruit lecanium is a key soft scale insect pest of shade trees and other woody ornamental plants in Pennsylvania.

Our weekly soybean report reveals low pest populations in fields with Japanese beetles, grasshoppers, and Septoria being most common.

If infested material is used for mulch, the artillery fungus may be already in the mulch when the load of mulch arrives.

Informational table showing disease name, symptoms, pathogen/cause, and management of Gloxinia diseases.

Informational table showing disease name, symptoms, pathogen/cause, and management of Gladiolus diseases.

Informational table showing disease name, symptoms, pathogen/cause, and management of Gerbera diseases.

Informational table showing disease name, symptoms, pathogen/cause, and management of Gaillardia diseases.

Our soybean sentinel plot reports reveal low populations of bean leaf beetle, Japanese beetle, and grasshoppers; diseases also remain low

Farms with continuous corn production, and specifically fields planted to the same Bt year after year, are at most risk for developing resistant rootworm populations.

Explore the history, transmission, and impact of West Nile virus in Pennsylvania, along with mosquito activity patterns and practical strategies to prevent bites and reduce risk.

Informational table showing disease name, symptoms, pathogen/cause, and management of azalea and rhododendron diseases.

Informational table showing apple varieties that are resistant to apple scab and recommended for home planting in Pennsylvania.

As in previous years, we are scouting soybean fields around PA to assess insect and pathogen populations.

Recommendations for safe pesticide applications to control spotted lanternfly infestations.