Pests and Diseases

Recommendations for managing pests and diseases, including webworms, beetles, weevils, mites, slugs, spotted lanternflies, leafminers, spiders and aphids. Tips on scale, root rot, viruses and integrated pest management.

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Jumping Earthworm (Amynthas spp.) Photo credit: Nancy Knauss
Look Out for Jumping Earthworms! - Articles Articles
An aggressive Asian earthworm is negatively impacting our gardens and ecosystem. Find out how to recognize this invasive species and help limit its spread. More
Spotted Lanternfly Permit Training
Spotted Lanternfly Permit Training - Online Courses Online Courses
Free
Spotted lanternfly is an invasive insect that can damage many crops. Learn best practices to stop its spread. Complete this training to receive permits from the Pennsylvania Department of Agriculture (PDA). More
Japanese beetle damage on rose foliage. Photo credit: Lois Miklas
Simple Strategies to Deal with Garden Pests, Diseases - Articles Articles
You can create a relatively pest and disease free garden if you believe that ‘perfect’ plants are not the absolute goal of gardening and that all insects are not out to get you. More
Adult spotted lanternflies. Photo Credit: E. Smyers
Spotted Lanternfly Management for Homeowners - Articles Articles

Spotted Lanternfly Management for Homeowners

Heather L Leach, Dave Biddinger, Ph.D., Grzegorz (Greg) Krawczyk, Ph.D.

A guide that reviews the identification, life cycle, current distribution, and techniques for managing spotted lanternfly on your property. More
Perdue Announces Emergency Funding for Spotted Lanternfly in Pennsylvania
Perdue Announces Emergency Funding for Spotted Lanternfly in Pennsylvania - News News
U.S. Secretary of Agriculture Sonny Perdue today announced $17.5 million in emergency funding to stop the spread of the spotted lanternfly in southeastern Pennsylvania. More
Plant Health Diagnosis: Assessing Plant Diseases, Pests and Problems
Plant Health Diagnosis: Assessing Plant Diseases, Pests and Problems - Online Courses Online Courses
$59.00
Learn a process for diagnosing plant health problems, including signs and symptoms of diseases, pests and insects, and environment or management issues. More
Damage to a row of boxwoods from boxwood leafminer. Photo: T. Butzler, Penn State
The Boxwood Leafminer Makes Its Yearly Entrance in Spring - Articles Articles
Boxwoods have many positive qualities that make it one of the most popular shrubs in the landscape. More
Water Gardening and AIS (Educator Version)
Water Gardening and AIS (Educator Version) - Webinars Webinars

Water Gardening and AIS (Educator Version)

Multiple Options Available

Free
This presentation provides a complete review of the Aquatic Invasive Species (AIS) Issue as it relates to Water Gardening. More
Water Gardening and Aquatic Invasive Species
Water Gardening and Aquatic Invasive Species - Webinars Webinars
Free
This presentation provides an overview of the Aquatic Invasive Species (AIS) Issue as it relates to Water Gardening. More
Salticus scenicus female
Zebra Jumper - Articles Articles
This spider, originally from Europe and Asia, is found sporadically from Nova Scotia to British Columbia, south to Georgia, and westward to Colorado. More
Herbert A. 'Joe' Pase III, Texas A&M Forest Service, Bugwood.org
Yellow Garden Spider - Articles Articles
Yellow garden spiders are seen in gardens, tall weeds, and sunny areas with bushes and other supporting structures on which they build their large orb webs. 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
Susan Ellis, Bugwood.org
Springtails - Articles Articles
Springtails are small, abundant, insect-like critters. If they become a nuisance in homes, it is usually during extended droughts or prolonged, saturating rains. More
Micrathena gracilis female
Spined Micrathena - Articles Articles
This small spider is commonly encountered in wooded locations, including landscaped residential and suburban locales. More
Spider Management
Spider Management - Articles Articles
Avoid bites by wearing gloves when doing yard work. More
Diagnosing Injury to Woody Ornamentals
Diagnosing Injury to Woody Ornamentals - Articles Articles
Adapted from Johnson, W.T. and H.H. Lyon. 1991. Insects that feed on trees and shrubs. 2nd ed., Cornell Univ. Press, Ithaca, New York, 560 pp. More
Kansas Department of Agriculture, Bugwood.org
Pennsylvania Wood Cockroaches - Articles Articles
The Pennsylvania wood cockroach is considered an occasional nuisance pest in homes in Pennsylvania. 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
Jim Baker, North Carolina State University, Bugwood.org
Native Holly Leafminer - Articles Articles
Ornamental plantings of holly in Pennsylvania are often damaged by leafmining pests. The native holly leafminer only feeds on the foliage of American holly. 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
Major Insect Pests of Red Clover in Pennsylvania
Major Insect Pests of Red Clover in Pennsylvania - Articles Articles
Two insect pests, the clover root curculio and the clover root borer, are partially responsible for the reduction or elimination of red clover stands. 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 Bugs on Broad-Leaved Evergreen Ornamental Plants - Articles Articles
Twenty-eight lace bug species have been recorded in Pennsylvania, but only a few are key pests of ornamental evergreen plants like azalea and rhododendron. 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
Joseph LaForest, University of Georgia, Bugwood.org
Juniper Scale - Articles Articles
The juniper scale, native to Europe, is now found throughout the United States. This key pest attacks junipers, cypresses, falsecypress, and incense cedar in landscapes and nurseries. More
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