Penn State Extension

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Do Lichens Cause Harm to Trees?
Do Lichens Cause Harm to Trees? - Videos Videos

Do Lichens Cause Harm to Trees?

Scott Weikert

3:50

Lichens are often thought to be a pest or disease to trees and shrubs. More
Kiln Drying of Hardwood Lumber
Kiln Drying of Hardwood Lumber - Workshops Workshops
This introductory short course is designed to enable participants to dry hardwood lumber to maximize product quality and value. More
A Guide to Preserving Trees in Development Projects
A Guide to Preserving Trees in Development Projects - Articles Articles

A Guide to Preserving Trees in Development Projects

William Elmendorf, Ph.D., Henry Gerhold, Ph.D., Larry Kuhns

This publication explains tree health and environmental considerations and details how to preserve trees. More
Controlling Weeds in Nursery and Landscape Plantings
Controlling Weeds in Nursery and Landscape Plantings - Articles Articles

Controlling Weeds in Nursery and Landscape Plantings

Tracey Lynn Harpster, Jim Sellmer, Ph.D., Larry Kuhns

This guide explains how people who grow and maintain landscape and nursery plantings can develop effective weed control programs. More
Why Does Lumber Need to be Dried?
Why Does Lumber Need to be Dried? - Videos Videos

Why Does Lumber Need to be Dried?

Scott Weikert

9:01

After lumber is sawn from the log it must be dried before it can be put into use. The forest products industry spends a lot of time and money to dry lumber and this video explains the reasons why. More
Choosing Plants Wisely
Choosing Plants Wisely - Articles Articles

Choosing Plants Wisely

Emelie Swackhamer, J. Robert Nuss, Larry Kuhns, Gregory Hoover

To create and maintain a healthy landscape, choose plants that are suited to the conditions in your yard. More
Introduction to Creating Healthy Landscapes
Introduction to Creating Healthy Landscapes - Articles Articles

Introduction to Creating Healthy Landscapes

Emelie Swackhamer, J. Robert Nuss, Larry Kuhns, Gregory Hoover

When a plant looks unhealthy or has been injured by an insect or a mite, often our first impulse is to apply a pesticide. More
Keeping Plants Well Groomed
Keeping Plants Well Groomed - Articles Articles

Keeping Plants Well Groomed

Emelie Swackhamer, J. Robert Nuss, Larry Kuhns, Gregory Hoover

Debris that builds up in the landscape can harbor pests and plant diseases. More
Pest Management Methods
Pest Management Methods - Articles Articles

Pest Management Methods

Emelie Swackhamer, J. Robert Nuss, Larry Kuhns, Gregory Hoover

IPM (integrated pest management) primarily consists of methods used to prevent plant problems from occurring in the first place. More
Plant with Care
Plant with Care - Articles Articles

Plant with Care

Emelie Swackhamer, J. Robert Nuss, Larry Kuhns, Gregory Hoover

One of the most important steps you can take to ensure the health and long life of your plants is to plant them correctly. More
Promote Plant Health
Promote Plant Health - Articles Articles

Promote Plant Health

Emelie Swackhamer, J. Robert Nuss, Larry Kuhns, Gregory Hoover

Healthy, vigorous plants are less vulnerable to attack by insects and disease. More
Monitor Pests and Keep Records
Monitor Pests and Keep Records - Articles Articles

Monitor Pests and Keep Records

Emelie Swackhamer, J. Robert Nuss, Larry Kuhns, Gregory Hoover

Inspecting your plants on a regular basis is essential to identifying and evaluating plant problems in their early stages. More
Planting and After Care of Community Trees
Planting and After Care of Community Trees - Articles Articles

Planting and After Care of Community Trees

William Elmendorf, Ph.D., Larry Kuhns

This publication is for people who plant trees in public landscapes, such as streets and parks, but its advice also is useful to those who plant trees around homes and businesses. More
Forest Landowners and Natural Gas Development
Forest Landowners and Natural Gas Development - Articles Articles

Forest Landowners and Natural Gas Development

David R. Jackson, Margaret C. Brittingham, Ph.D., Scott Weikert, James Finley, Ph.D.

Before signing a lease on your forestland, there are many things to consider to protect your interests. More
Beautiful garden landscapes, like the one in this illustration, can be obtained through smart and heathy management plans
Creating Healthy Landscapes - Articles Articles

Creating Healthy Landscapes

Emelie Swackhamer, J. Robert Nuss, Larry Kuhns, Gregory Hoover

This article outlines steps to help homeowners take better care of landscape plants and provides an introduction to basic integrated pest management concepts. More
Many different species of fungi produce fruiting bodies called mushrooms.
What Is Growing in My Landscape Mulch? Mushrooms, Slime Molds, and Fungus - Articles Articles
This article describes four common types of fungi growing in landscape mulches in the eastern United States: mushrooms, slime molds, bird's nest fungus, and the artillery fungus. More