Eastern Forest Threat Center - Browse Threats
Your search for Pennsylvania returned 218 threats in the following categories:

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THREAT
LATIN NAME
INVASIVE PLANTS   Back to Top
       Amur Corktree Phellodendron amurense
       Amur Honeysuckle Lonicera maackii
       Amur Maple Acer ginnala
       Annual Bastard-Cabbage Rapistrum rugosum
       Arrow Bamboo Pseudosasa japonica
       Autumn Olive Elaeagnus umbellata
       Bearded Beggarticks Bidens aristosa
       Beefsteak Plant Perilla frutescens
       Bell's Honeysuckle Lonicera x bella
       Bigleaf Periwinkle Vinca major
       Bird's Foot Trefoil Lotus corniculatus
       Bittersweet Nightshade Solanum dulcamara
       Black Jetbead Rhodotypos scandens
       Black Swallowwort Cynanchum louiseae
       Border Privet Ligustrum obtusifolium
       Brown Knapweed Centaurea jacea
       Bull Thistle Cirsium vulgare
       Butterfly Bush Buddleja davidii
       Callery Pear Pyrus calleryana
       Canada Thistle Cirsium arvense
       Carolina Fanwort Cabomba caroliniana
       Cheatgrass Bromus tectorum
       Chinese Elm Ulmus parvifolia
       Chinese Lespedeza Lespedeza cuneata
       Chinese Silvergrass Miscanthus sinensis
       Chinese Wisteria Wisteria sinensis
       Chinese Yam Dioscorea oppositifolia
       Chocolate Vine Akebia quinata
       Coltsfoot Tussilago farfara
       Common Barberry Berberis vulgaris
       Common Buckthorn Rhamnus cathartica
       Common Bugle Ajuga reptans
       Common Burdock Arctium minus
       Common Chickweed Stellaria media
       Common Mullein Verbascum thapsus
       Common Periwinkle Vinca minor
       Common Reed Phragmites australis
       Common Tansy Tanacetum vulgare
       Common Teasel Dipsacus fullonum
       Crack Willow Salix fragilis
       Crown Vetch Coronilla varia
       Cutleaf Blackberry Rubus laciniatus
       Cypress Spurge Euphorbia cyparissias
       Cypressvine Morningglory Ipomoea quamoclit
       Dalmatian Toadflax Linaria dalmatica
       Dame's Rocket Hesperis matronalis
       Elecampane Inula helenium
       English Ivy Hedera helix
       Eurasian Water Milfoil Myriophyllum spicatum
       European Alder Alnus glutinosa
       European Mountain Ash Sorbus aucuparia
       European Privet Ligustrum vulgare
       European White Birch Betula pendula
       Field Bindweed Convolvulus arvensis
       Flowering Rush Butomus umbellatus
       Fuzzy Pride-of-Rochester Deutzia scabra
       Garden Valeriana Valeriana officinalis
       Garlic Mustard Alliaria petiolata
       Giant Hogweed Heracleum mantegazzianum
       Giant Knotweed Polygonum sachalinense
       Glossy Buckthorn Rhamnus frangula
       Goat's Rue Galega officinalis
       Goutweed Aegopodium podagraria
       Ground Ivy Glechoma hederacea
       Guelder Rose Viburnum opulus
       Hairy Vetch Vicia villosa
       Hairy Whitetop Lepidium appelianum
       Hoary False Madwort Berteroa incana
       Horse Chestnut Aesculus hippocastanum
       Houndstongue Cynoglossum officinale
       Hydrilla Hydrilla verticillata
       Japanese Angelica Tree Aralia elata
       Japanese Barberry Berberis thunbergii
       Japanese Bristlegrass Setaria faberi
       Japanese Climbing Fern Lygodium japonicum
       Japanese Clover Kummerowia striata
       Japanese Honeysuckle Lonicera japonica
       Japanese Hop Humulus japonicus
       Japanese Knotweed Polygonum cuspidatum
       Japanese Pachysandra Pachysandra terminalis
       Japanese Spiraea Spiraea japonica
       Japanese Wisteria Wisteria floribunda
       Japanese Yew Taxus cuspidata
       Jimsonweed Datura stramonium
       Johnsongrass Sorghum halepense
       Jointhead Grass Arthraxon hispidus
       Kochia Kochia scoparia
       Kudzu Pueraria montana
       Leafy Spurge Euphorbia esula
       Lesser Celandine Ranunculus ficaria
       Linden Arrowwood Viburnum dilatatum
       Medusahead Taeniatherum caput-medusae
       Mile-A-Minute Weed Persicaria perfoliata
       Moneywort Lysimachia nummularia
       Morrow's Honeysuckle Lonicera morrowii
       Multiflora Rose Rosa multiflora
       Musk Thistle Carduus nutans
       Narrow-leaved Cattail Typha angustifolia
       Nepalese Browntop Microstegium vimineum
       Norway Maple Acer platanoides
       Orange Hawkweed Hieracium aurantiacum
       Oriental Bittersweet Celastrus orbiculatus
       Oriental Ladysthumb Polygonum caespitosum
       Oxeye Daisy Leucanthemum vulgare
       Pale Swallow-wort Cynanchum rossicum
       Paper Mulberry Broussonetia papyrifera
       Piedmont Bedstraw Galium pedemontanum
       Poison Hemlock Conium maculatum
       Porcelainberry Ampelopsis brevipedunculata
       Princesstree Paulownia tomentosa
       Purple Loosestrife Lythrum salicaria
       Purple Star Thistle Centaurea calcitrapa
       Quackgrass Elymus repens
       Queen Anne's Lace Daucus carota
       Reed Canary Grass Phalaris arundinacea
       Ricefield Flatsedge Cyperus iria
       Rose of Sharon Hibiscus syriacus
       Rush Skeletonweed Chondrilla juncea
       Russian Olive Elaeagnus angustifolia
       Russian Thistle Salsola kali
       Scotch Broom Cytisus scoparius
       Scotch Thistle Onopordum acanthium
       Scots Pine Pinus sylvestris
       Sheep Sorrel Rumex acetosella
       Shepherd's Purse Capsella bursa-pastoris
       Shrubby Lespedeza Lespedeza bicolor
       Siberian Elm Ulmus pumila
       Silktree Albizia julibrissin
       Small Broomrape Orobanche minor
       Spiny Plumeless Thistle Carduus acanthoides
       Spotted Knapweed Centaurea biebersteinii
       St. Johnswort Hypericum perforatum
       Star-of-Bethlehem Ornithogalum umbellatum
       Sweet Autumn Virginsbower Clematis terniflora
       Sweet Cherry Prunus avium
       Sweet-Breath-of-Spring Lonicera fragrantissima
       Sycamore Maple Acer pseudoplatanus
       Tall Fescue Lolium arundinaceum
       Tansy Ragwort Senecio jacobaea
       Tatarian Honeysuckle Lonicera tatarica
       Tree-of-Heaven Ailanthus altissima
       Tropical Soda Apple Solanum viarum
       Velvetleaf Abutilon theophrasti
       Wayfaring tree Viburnum lantana
       Weeping Lovegrass Eragrostis curvula
       Weeping Willow Salix x sepulcralis
       White Mulberry Morus alba
       White Poplar Populus alba
       Whitetop Cardaria draba
       Wild Chervil Anthriscus sylvestris
       Wild Garlic Allium vineale
       Wild Parsnip Pastinaca sativa
       Wineberry Rubus phoenicolasius
       Winged Burning Bush Euonymus alatus
       Winter Creeper Euonymus fortunei
       Yellow Iris Iris pseudacorus
       Yellow Starthistle Centaurea solstitialis
       Yellow Sweetclover Melilotus officinalis
       Yellow Toadflax Linaria vulgaris
INSECTS   Back to Top
       Banded Elm Bark Beetle Scolytus schevyrewi
       Beech Scale Cryptococcus fagisuga
       Birch Leafminer Fenusa pumila
       Black Turpentine Beetle Dendroctonus terebrans
       Columbian Timber Beetle Corthylus columbianus
       Eastern Five-spined Engraver Ips grandicollis
       Eastern Larch Beetle Dendroctonus simplex
       Eastern Six-spined Engraver Ips calligraphus
       Eastern Tent Caterpillar Malacosoma americanum
       Elm Leaf Beetle Xanthogaleruca luteola
       Elongate Hemlock Scale Fiorinia externa
       Emerald Ash Borer Agrilus planipennis
       Fall Webworm Hyphantria cunea
       Forest Tent Caterpillar Malacosoma disstria
       Gypsy Moth Lymantria dispar
       Hemlock Woolly Adelgid Adelges tsugae
       Introduced Pine Sawfly Diprion similis
       Larch Sawfly Pristiphora erichsonii
       Nantucket Pine Tip Moth Rhyacionia frustrana
       Pales Weevil Hylobius pales
       Pear Thrips Taeniothrips inconsequens
       Pine Shoot Beetle Tomicus piniperda
       Red Oak Borer Enaphalodes rufulus
       Sirex Woodwasp Sirex noctilio
       Small Southern Pine Engraver Ips avulsus
       Smaller European Elm Bark Beetle Scolytus multistriatus
       Southern Pine Beetle Dendroctonus frontalis
       Twolined Chestnut Borer Agrilus bilineatus
       White Pine Weevil Pissodes strobi
DISEASES   Back to Top
       Amylostereum Rot Amylostereum areolatum
       Annosus Root Rot Heterobasidion annosum
       Armillaria Root Disease Armillaria mellea
       Beech Bark Disease Neonectria coccinea var. faginata
       Butternut Canker Sirococcus clavigignenti-juglandacearum
       Chestnut Blight Cryphonectria parasitica
       Diplodia Blight of Pines Sphaeropsis sapinea
       Dogwood Anthracnose Discula destructiva
       Dutch Elm Disease Ophiostoma ulmi
       Elm Phloem Necrosis
       Littleleaf Disease
       Oak Decline
       Oak Wilt Ceratocystis fagacearum
       Thousand Cankers Disease Geosmithia sp.
       White Pine Blister Rust Cronartium ribicola
CLIMATE   Back to Top
       Climate Change
       Drought
       Flooding
       Hurricanes
       Ice Storms
LOSS OF OPEN SPACE   Back to Top
       Conversion
       Fragmentation
       Parcellation
POLLUTION   Back to Top
       Acid Deposition
       Ozone
       Salt Injury
WILDLAND FIRES   Back to Top
       Lack of Fuels Treatment
       Wildland Arson
OTHER INVASIVE SPECIES   Back to Top
       Non-native Earthworms
UNMANAGED RECREATION   Back to Top
       Off-Highway Vehicles

The items above are part of an initial list of forest threats. These should not be interpreted as the top threats affecting forests in the Eastern U.S. We appreciate your feedback as additional forest threats are added to this page and as we work to further develop the forest threat summary viewer tool.