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Since 1985, European apple sawfly (Hoplocampa testudinea) has extended its range, and is now a common pest in fruit orchards located throughout Pennsylvania.

Disinfectants are chemicals that kill or inactivate pathogens before plant infection occurs. This article addresses the disinfection of equipment.

Become a Tree Tender and help increase the tree canopy in your community!

A cursory look at an unhealthy tree may lead to some initial ideas of what is causing a decline in health, but a closer look may reveal other causes initially unnoticed.

Participants in this one-day pesticide update receive research-based information and recertification credits in hard-to-find categories.

Strengthen your arborist skills with training in tree biology, care, and risk management while preparing for the ISA Certified Arborist exam.

Peach bark beetle (Phloeotribus liminaris Harris) {Coleoptera: Scolytidae} has been observed on black cherry in areas of northwest Pennsylvania.

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

One of my favorite native trees from back in my forestry days is Carpinus caroliniana, or American hornbeam, blue beech, or musclewood.

Create a festive 14-inch evergreen tree using boxwood and holly while learning how to grow and care for these garden plants.

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

Learn how to identify, plant, and care for conifers that thrive locally to enhance your landscape with year-round interest.

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.

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.

Pears were once the dominant fruit grown in North America, the earliest known pear orchard was reported in 1630 in Massachusetts.

Learn to manage landscape plant and turfgrass pests with expert instruction, pest identification, and horticultural best practices at this all-day workshop.

Recommendations for safe pesticide applications to control spotted lanternfly infestations.

Soil testing is a soil-management tool used to determine the fertility of soil as well as the optimum lime and fertilizer requirements for crops.

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

Many things make plants unwell and pests and diseases are only two causes of poor plant growth.

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.

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

Although it is not particularly common, pear scab is very destructive when it does occur.