Pests and Diseases

Recommendations for managing pests and diseases, including Fletcher scale, leafhoppers, spotted lanternfly, webworms, mites, caterpillars, pillbugs, weevils, scales, borers, beetles, aphids, moths, blight, necrosis, root rot and freeze damage.

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Lacewings are close relatives of dobsonflies and fishflies, all found within the insect order Neuroptera, also known as the net-winged insects. Photo: Amy Korman, Penn State
Promoting Beneficial Insects in the Landscape: Lacewings - Articles Articles
Lacewings get their name from the intricate net-like arrangement of veins on their wings. With the arrival of spring, lacewings are much more active in our landscapes. More
Figure 1. Caterpillar or sawfly? Accurate identification of the pest is critical when using bio-insecticides. Bt products will control small caterpillars, but would be ineffective on the sawfly larva shown in this photo.
Bio-insecticides in Greenhouse Ornamentals - Articles Articles

Bio-insecticides in Greenhouse Ornamentals

Lee Stivers, Ruth Benner

Bio-pesticides, also known as biological pesticides, are defined by the US EPA as pesticides derived from natural materials such as animals, plants, bacteria, fungi, and certain minerals. More
The Basics of Bio Control of Insects for Greenhouses and Nurseries
The Basics of Bio Control of Insects for Greenhouses and Nurseries - Videos Videos
Bio control of insects in greenhouses and nurseries is a pest management strategy that is increasing in use and application. This video covers some of the bio control agents (BCA's) that are being used in horticultural applications. More
Thrips larvae. Photo: Sinclair Adam, Penn State
Greenhouse Growers, Are You Ready for Thrips? - News News
As greenhouse producers are preparing for spring and the flowers become more numerous, it is time to get ready for those dreaded thrips. More
Turf & Ornamentals School
Turf & Ornamentals School - Workshops Workshops

Turf & Ornamentals School

07/12/2018

Annville, PA

$85.00
Pest management information on ornamental plants and turfgrass pests will be covered at this informative school. More
Photo: T. Baugher, Penn State
A Brief Guide to Hand Lenses - Articles Articles

A Brief Guide to Hand Lenses

Michael J. Skvarla

Arthropods, including plant pests and biocontrol agents, are often difficult to identify with the naked eye. More
Bringing Houseplants Indoors
Bringing Houseplants Indoors - Articles Articles
Many houseplants thrive outdoors in the summertime, but must be brought indoors before temperatures get too low. They need to readjust to conditions inside the house. 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
Keeping greenhouses free of weeds helps control diseases and insect pests.
Zero Tolerance for Weeds in the Greenhouse - Articles Articles
"Don't let weeds grow in the greenhouse." Growers know it, customers sense it, and Extension educators preach it. But is zero tolerance for weeds attainable? More
Sowbugs and pillbugs congregate in moist areas. Photo by Sinclair Adam.
Sowbugs and Pillbugs: Occasional but Destructive Greenhouse Pests - Articles Articles
We hear periodic reports of sowbug and/or pillbug outbreaks in greenhouses and high tunnels in Pennsylvania. More
Tobacco Mosaic Virus on petunia. Photo: T. Ford, Penn State
Tobacco Mosaic Virus Prevention Starts with Worker Training - Articles Articles
The most important way that Tobacco Mosaic Virus (TMV) can be spread from plant to plant is on workers' hands, clothing or on tools. 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
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
Calibration How Tos: How to Calibrate Your Rotary Spreader
Calibration How Tos: How to Calibrate Your Rotary Spreader - Videos Videos
The video shows you how to calibrate your rotary spreader. 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
James B. Hanson, USDA Forest Service, Bugwood.org
White Pine Weevil - Articles Articles
The white pine weevil is considered the most destructive insect pest of eastern white pine in North America. More
Gyorgy Csoka, Hungary Forest Research Institute, Bugwood.org
Western Conifer Seed Bug - Articles Articles
The western conifer seed bug feeds on Douglas-fir seeds and other species of pine. This bug can also become a nuisance to homeowners in the fall. 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
Louis Tedders, USDA Agricultural Research Service, Bugwood.org
Tarnished Plant Bug - Articles Articles
Plant bugs are a large, diverse family of insects that feed by sucking sap from plants, especially parts with high rates of cell division like buds and flowers. More
USDA Forest Service - Region 4 - Intermountain, USDA Forest Service, Bugwood.org
Spruce Spider Mite - Articles Articles
The spruce spider mite attacks spruce, arborvitae, juniper, hemlock, pine, Douglas-fir, and occasionally other conifers. 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
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
James W. Amrine Jr., West Virginia University, Bugwood.org
Rose-Seed Megastigmus - Articles Articles
Rose-seed Megastigmus is a tiny seed-infesting wasp that is common in homes and establishments where dried flowers and potpourri containing rose hips are found. More
Rhododendron Borer
Rhododendron Borer - Articles Articles
The rhododendron borer is a native pest of rhododendron, sometimes attacking mountain laurel and deciduous azaleas growing adjacent to infested host plants. 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
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