See All Pest, Disease and Weed Identification

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.

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

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.

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.

Pear psylla adults, Cacopsylla pyricola, look like small cicadas and become active any time the temperature is above 40°F.

Nematodes undoubtedly are the most numerous multicellular animals in the world. You can pick up a handful of soil almost anywhere and extract nematodes from it.

Bacterial spot, Xanthomonas arboricola pv. pruni, is a difficult disease to manage.

Early season apple disease management is primarily directed at controlling scab.

Lifting the PPV quarantine in Pennsylvania offered the opportunity for a "fresh start" and growers must plan carefully to get the most from their investment.

The fungi causing fruit rots can be quite stealthy since spores will land on the fruit and cause symptoms after the fruit have been in storage.

The pear leaf spot fungus, Mycosphaerella pyri, infects the leaves of pear, quince, and occasionally apple trees. Numerous leaf spots can produce defoliation.