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Spotted Lanternfly: What to Look For
Spotted Lanternfly: What to Look For - Articles Articles
Spotted Lanternfly, Lycorma delicatula, is a new threat to Pennsylvania and the United States, and experts are still learning how to combat it. More
Close-up of fringetree flowers which have some fragrance to them. Photo: Mike Masiuk, Penn State
Spring Floral Display: Chionanthus Virginicus, White Fringetree - Articles Articles
Although the common name, white fringetree, alludes to a tree, it is often treated as a large shrub in the landscape, reaching a range of anywhere from 12 to 20 feet. More
Winterberry fruit. Photo credit: Mike Masiuk
Shrubs and Trees for the Winter Landscape - Articles Articles
Look for trees and shrubs that could beautify your property and nurture wildlife during the winter months. More
Stay Alert for Oak Wilt!
Stay Alert for Oak Wilt! - Articles Articles

Stay Alert for Oak Wilt!

Sandy Feather

Oak wilt was not known in New York before 2008, but foresters and arborists are managing it there now. More
Gerald J. Lenhard, Louisiana State University, Bugwood.org
Tree Fruit Insect Pest - Yellownecked Caterpillar - Articles Articles
The yellownecked caterpillar is a key pest of shade trees. This insect is also destructive on the foliage of blueberry, apple, and other fruit trees. More
Extendiendo la Temporada Productiva con Túneles Altos
Extendiendo la Temporada Productiva con Túneles Altos - Articles Articles
Los túneles altos ofrecen protección a las plantas de tierras saturadas de humedad y temperaturas bajas en la primavera y el otoño con lo cual se extiende la temporada productiva. More
Stigmina Leaf Spot. Photo by Joseph OBrien, USDA Forest Service, Bugwood.org
Tree Diseases - Articles Articles

Tree Diseases

Tim Abbey

Living in the humid mid-Atlantic area, we have lots of fungal and bacterial diseases to contend with. More
Acer rubrum Red Sunset® on a commercial site with suspected glyphosate damage. Photo: S. Feather, Penn State
Use Glyphosate With Care Near Trees! - Articles Articles
Glyphosate is the active ingredient in non-selective, systemic herbicides sold under a variety of trade names – Round Up, Accord, Glypro, and many others. More
Four-lined plant bug adult. Photo: S. Feather, Penn State
Four-lined Plant Bugs Are Active Now - Articles Articles
Four-lined plant bugs, Poecilocapsus lineatus, become active in May. More
Black walnut fruit. Photo: K. Salisbury, Penn State
Working With the Black Walnut - Articles Articles

Working With the Black Walnut

Kathleen V. Salisbury

Black walnut is one of the last trees to leaf out in the spring and one of the first to lose its leaves in the fall. More
Organic Land Care Best Management Practices Manual
Organic Land Care Best Management Practices Manual - Articles Articles
This free manual provides recommendations to land managers and landscape contractors on best management practices for effectively conducting organic land care. More
E. Richard Hoebeke, Cornell University, Bugwood.org
Viburnum Leaf Beetle - Articles Articles

Viburnum Leaf Beetle

Steve Jacobs

An invasive species, the viburnum leaf beetle has the potential to become a serious problem in nurseries and landscapes in Pennsylvania. More
Gerald J. Lenhard, Louisiana State University, Bugwood.org
Tuliptree Scale - Articles Articles
The tuliptree scale is a pest of yellow poplar, or tuliptree, magnolia, and linden. This soft scale insect is so prolific that it can cover twigs and branches. More
Whitney Cranshaw, Colorado State University, Bugwood.org
Snailcase Bagworm - Articles Articles
The snailcase bagworm is a moth (family Psychidae) that was accidentally introduced into the United States from Europe in the 1940s. More
Kira Metz, USDA APHIS PPQ, Bugwood.org
Powderpost Beetles - Articles Articles
Powderpost beetles breed in dead and dried hardwoods. Their presence is overlooked until they are discovered in stored lumber, rafters, joists, floors, and furniture. More
J.L. Danet, INRA Centre de Recherches de Bordeaux, Bugwood.org
Potato Leafhopper on Woody Ornamentals - Articles Articles
The potato leafhopper has been noted on more than 200 host plants, many of which are ornamental plants. However, this insect is best known as a field crop pest. More
John Ghent, John Ghent, Bugwood.org
Periodical Cicada - Articles Articles
The periodical cicada is the longest-lived insect in North America. They are distributed over the eastern United States and occur nowhere else in the world. More
E. Bradford Walker, Vermont Department of Forests, Parks and Recreation, Bugwood.org
Pear Thrips in Pennsylvania - Articles Articles
The pear thrips is native to Europe. Since the 1980s, the pear thrips has been recognized as a forest tree pest in Pennsylvania, particularly damaging sugar maples. More
Whitney Cranshaw, Colorado State University, Bugwood.org
Oystershell Scale - Articles Articles
The oystershell scale is a common armored scale insect that causes injury to shade trees and shrubs, most often lilac, ash, dogwood, maple, poplar, and willow. More
Lorraine Graney, Bartlett Tree Experts, Bugwood.org
Obscure Scale - Articles Articles
The armored obscure scale is a key pest of oak in Pennsylvania, and can attack other woody host plants such as beech, dogwood, hickory, maple, and willow. More
Pest and Diseases Image Library, Bugwood.org
Oak Leaf Itch Mite - Articles Articles
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. More
Lacy L. Hyche, Auburn University, Bugwood.org
Mimosa Webworm - Articles Articles
The mimosa webworm feeds primarily on the leaves of mimosa and honeylocust trees. It was unintentionally introduced from China during early 1940s. More
Eric R. Day, Virginia Polytechnic Institute and State University, Bugwood.org
Magnolia Scale - Articles Articles
The magnolia scale is one of the largest scale insects in the United States. It feeds only on magnolia. More
USDA Forest Service , USDA Forest Service, Bugwood.org
Lace Bug on Deciduous Woody Ornamental Plants - Articles Articles
Twenty-eight lace bug species have been recorded in Pennsylvania, but only a few are key pests of ornamental plants, found on the foliage of trees and shrubs. More
J.A. Davidson, Univ. Md, College Pk, Bugwood.org
Japanese Maple Scale - Articles Articles
The Japanese maple scale is a recently detected pest of a wide range of woody host plants in Pennsylvania. More
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