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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
Figure 1. Lodged corn seen from a distance.
Corn rootworms Suspected of Resistance to Bt Corn Varieties Discovered - Articles Articles
Western corn rootworms that developed resistance to some Bt corn varieties may now be a problem in PA. More
Figure 1. Drain plugs must be sealed. Photo: PA Mushroom IPM Handbook
IPM in Mushroom Production: Exclusion Techniques for Pest Control - Articles Articles

IPM in Mushroom Production: Exclusion Techniques for Pest Control

Maria Gorgo-Gourovitch, David Meigs Beyer, Ph.D., John A. Pecchia, Ph.D.

Exclusion prevents the entrance of pest organisms into new rooms and their escape from older ones. The latter should not be underestimated. More
Most adults emerge and lay up to 500 eggs during July and August on tree trunks, in cracks or under bark scales, and in soil near the tree trunk. Photo by G. Krawczyk.
Tree Fruit Insect Pest - Peachtree Borer - Articles Articles

Tree Fruit Insect Pest - Peachtree Borer

Grzegorz (Greg) Krawczyk, Ph.D.

The peachtree borer, Synanthedon exitiosa, is primarily a pest of peach and nectarine trees, but it also attacks apricot, cherry, and plum. More
Orchards may be invaded by young larvae ballooning long distances on silk threads. Photo by G. Krawczyk.
Tree Fruit Insect Pest - Gypsy Moth - Articles Articles

Tree Fruit Insect Pest - Gypsy Moth

Grzegorz (Greg) Krawczyk, Ph.D.

Gypsy moth, Lymantria dispar, may attack fruit trees, especially apple, causing defoliation that can stunt or kill young trees. More
Source: Frank Peairs, Colorado State University, Bugwood.org
Tree Fruit Mite Pest - Twospotted Spider Mite - Articles Articles

Tree Fruit Mite Pest - Twospotted Spider Mite

Grzegorz (Greg) Krawczyk, Ph.D.

The twospotted spider mite, Tetranychus urticae, while a pest of apple, peach, and other fruit trees, also feeds on a wide range of both wild and cultivated plants. More
Adult beetles are ¼ inch long, dark brown with whitish patches, with four humps on their wing covers, and a protruding snout one-third its body length. Photo by G. Krawczyk.
Tree Fruit Insect Pest - Plum Curculio - Articles Articles

Tree Fruit Insect Pest - Plum Curculio

Grzegorz (Greg) Krawczyk, Ph.D.

Plum curculio, Conotrachelus nenuphar, is an injurious pest of apples, cherries, nectarines, peaches, and plums throughout the state. More
Oriental fruit moth are gray, with a wing spread of ¼ inch; the wings are gray with dark markings. Photo by G. Krawczyk.
Tree Fruit Insect Pest - Oriental Fruit Moth - Articles Articles

Tree Fruit Insect Pest - Oriental Fruit Moth

Grzegorz (Greg) Krawczyk, Ph.D.

Oriental fruit moth, Grapholita molesta, is a pest of most stone and pome fruits. In pome fruits, its appearance and injury is similar to that of the codling moth and lesser appleworm. More
Adults feed on leaves and fruit. They chew leaf tissue between veins and leave a lacelike skeleton. Photo by G. Krawczyk.
Tree Fruit Insect Pest - Japanese Beetle - Articles Articles

Tree Fruit Insect Pest - Japanese Beetle

Grzegorz (Greg) Krawczyk, Ph.D.

Japanese beetle, Popillia japonica, is one of the best-known pests to be encountered by Pennsylvania fruit growers, nursery operators, and gardeners. More
The aphids’ bodies are nearly covered by a woolly mass of long waxy fibers that gives them a whitish, mealy appearance and that are much shorter on the root-inhabiting aphids. Photo by G. Krawczyk.
Tree Fruit Insect Pest - Woolly Apple Aphid - Articles Articles

Tree Fruit Insect Pest - Woolly Apple Aphid

Grzegorz (Greg) Krawczyk, Ph.D.

The woolly apple aphid, Eriosoma lanigerum, is a widely distributed pest of apple trees, especially where its parasites have been killed by insecticides. More
Upon hatching, crawlers immediately move to new sites. Female crawlers are generally more active and disperse throughout the tree. Photo by G. Krawczyk.
Tree Fruit Insect Pest - White Peach Scale - Articles Articles

Tree Fruit Insect Pest - White Peach Scale

Grzegorz (Greg) Krawczyk, Ph.D.

White peach scale, Pseudalacaspis pentagona, is considered an economic pest of peach and woody ornamentals in southeastern United States. More
Source: Frank Peairs, Colorado State University, Bugwood.org
Tree Fruit Insect Pest - Western Flower Thrips - Articles Articles

Tree Fruit Insect Pest - Western Flower Thrips

Grzegorz (Greg) Krawczyk, Ph.D.

Widespread fruit loss from western flower thrips, Frankliniella occidentalis, was first observed in early 1990. More
Source: Todd M. Gilligan and Marc E. Epstein, CSU, Bugwood.org
Tree Fruit Insect Pest - Variegated Leafroller - Articles Articles

Tree Fruit Insect Pest - Variegated Leafroller

Grzegorz (Greg) Krawczyk, Ph.D.

Although variegated leafroller, Platynota flavedana, is an important pest of apple in Virginia and West Virginia, it only occasionally causes damage in southern Pennsylvania. More
The tufted apple bud moth is named for the tufted scales that can be seen as two or three groups on the tops of the wings. Photo by G. Krawczyk.
Tree Fruit Insect Pest -Tufted Apple Bud Moth - Articles Articles

Tree Fruit Insect Pest -Tufted Apple Bud Moth

Grzegorz (Greg) Krawczyk, Ph.D.

The tufted apple bud moth, Platynota idaeusalis, is a serious direct pest of apples in the five-state Cumberland-Shenandoah region of the eastern United States. More
Source: Eric R. Day, Virginia Polytechnic Institute and State University, Bugwood.org
Tree Fruit Insect Pest - Spotted Wing Drosophila - Articles Articles

Tree Fruit Insect Pest - Spotted Wing Drosophila

Grzegorz (Greg) Krawczyk, Ph.D.

The spotted wing drosophila (SWD), Drosophila suzukii, is an invasive species originally from Asia. More
Source: Ben Sale, available under creative commons license 2.0 creativecommons.org/licenses/by/2.0/legalcode
Tree Fruit Insect Pest - Spotted Tentiform Leafminer - Articles Articles

Tree Fruit Insect Pest - Spotted Tentiform Leafminer

Grzegorz (Greg) Krawczyk, Ph.D.

The spotted tentiform leafminer, Phyllonorycter blancardella, affects the leaves of apple trees throughout the growing season. More
Source: Natasha Wright, Cook's Pest Control, Bugwood.org
Tree Fruit Insect Pest - Shothole Borer - Articles Articles

Tree Fruit Insect Pest - Shothole Borer

Grzegorz (Greg) Krawczyk, Ph.D.

The shothole borer, Scolytus rugulosus, sometimes called the fruit tree bark beetle, is a native of Europe but now occurs throughout the United States. More
Scales on new growth and fruit produce deep purplish-red coloration in the tissue. Photo by G. Krawczyk.
Tree Fruit Insect Pest - San Jose Scale - Articles Articles

Tree Fruit Insect Pest - San Jose Scale

Grzegorz (Greg) Krawczyk, Ph.D.

The San Jose scale, Quadraspidiotus perniciosus, is a pest of fruit trees, but it attacks many other trees as well as shrubs. More
Young aphids congregate closely around the stem mother. This habit soon causes the death of the infested leaves and the consequent migration of the aphids. Photo by G. Krawczyk.
Tree Fruit Insect Pest - Rosy Apple Aphid - Articles Articles

Tree Fruit Insect Pest - Rosy Apple Aphid

Grzegorz (Greg) Krawczyk, Ph.D.

The rosy apple aphid, Dysaphis plantaginea, has been a major pest of apple trees since the end of the nineteenth century. More
Source: Whitney Cranshaw, Colorado State University, Bugwood.org
Tree Fruit Insect Pest - Rose Leafhopper - Articles Articles

Tree Fruit Insect Pest - Rose Leafhopper

Grzegorz (Greg) Krawczyk, Ph.D.

Rose leafhopper, Edwardsiana rosae, is a minor pest on apples in the Mid-Atlantic region. Orchards in the vicinity of multiflora rose or brambles are especially at risk. More
Source: Clemson University - USDA Cooperative Extension Slide Series, Bugwood.org
Tree Fruit Insect Pest - Redbanded Leafroller - Articles Articles

Tree Fruit Insect Pest - Redbanded Leafroller

Grzegorz (Greg) Krawczyk, Ph.D.

Redbanded leafroller, Argyrotaenia velutinana, is considered a minor pest of apples and many other deciduous fruit crops throughout most of Pennsylvania. More
The adult is about 1.5 inches long, mostly black, with red eyes and other reddish markings. The wings are large and clear except for orange-red veins. Photo by G. Krawczyk.
Tree Fruit Insect Pest - Periodical Cicada - Articles Articles

Tree Fruit Insect Pest - Periodical Cicada

Grzegorz (Greg) Krawczyk, Ph.D.

The periodical cicada, Magicicada septemdecim, is a large flying insect with a unique life history. It lives most of its 17-year life underground. More
Source: Pennsylvania Department of Conservation and Natural Resources - Forestry, Bugwood.org
Tree Fruit Insect Pest - Pear Thrips - Articles Articles

Tree Fruit Insect Pest - Pear Thrips

Grzegorz (Greg) Krawczyk, Ph.D.

Pear thrips, Taeniothrips inconsequens, was introduced early this century, probably from Europe. More
Source: Cheryl Moorehead, Bugwood.org
Tree Fruit Insect Pest - Pear Slug - Articles Articles

Tree Fruit Insect Pest - Pear Slug

Grzegorz (Greg) Krawczyk, Ph.D.

The pear slug, Caliroa cerasi, resembles a slug in appearance, but it is actually a sawfly. More
Nymphs move to succulent stems and developing leaves to feed, with the heaviest concentration along the midveins of leaves and at the calyx end of fruit. Photo by G. Krawczyk.
Tree Fruit Insect Pest - Pear Psylla - Articles Articles

Tree Fruit Insect Pest - Pear Psylla

Grzegorz (Greg) Krawczyk, Ph.D.

Pear psylla, Cacopsylla pyricola, can be a limiting factor in pear production. More
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