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Invasive Pests

emerald ash borer

Invasive Insects

Several invasive plants and insects are monitored and controlled by the Department, including the European gypsy moth, asian longhorned beetle, walnut twig beetle, and the hemlock woolly adelgid.

Asian Longhorned Beetle

Asian longhorned beetle (Anoplophora glabripennis) is a destructive wood-boring pest of maple and other hardwoods, eventually killing them. In June 2011, the Asian Longhorned Beetle was discovered in Tate Township in Clermont County. This invasive beetle has no known natural predators and poses a threat to Ohio's hardwood forests (more than $2.5 billion in standing maple timber) and the state's $5 billion nursery industry which employs nearly 240,000 people. alb

Box Tree Moth

Box tree moth (Cydalima perspectalis) is an invasive pest destructive to boxwood plants. Native to temperate and sub-tropical regions in Asia, it was first reported in Europe in 2007, after which it spread rapidly across Europe into Western Asia and Northern Africa. In 2018, it was documented in Canada, and now has been confirmed in the US. btm

Emerald Ash Borer

Emerald ash borer (Agrilus Planipennis), an ash tree-killing insect from Asia, was first identified in Ohio in 2003. The pest has since spread from the initial detection near Toledo to all of the counties in the state. Because the pest has established itself throughout all of Ohio, in July 2011 ODA lifted the quarantine regulations in place for emerald ash borer within the state. Ohio is still inside the Federal quarantine boundary, and the movement of EAB regulated articles cannot exit the quarantine boundaries without Federal permits. emerald ash borer beetle

Hemlock Woolly Adelgid

Hemlock woolly adelgid (Adelges tsugae) is a serious pest of Eastern (Tsuga canadensis) and Carolina (Tsuga caroliniana) hemlocks of all sizes. Native to Asia, HWA was first discovered in North America in British Columbia in 1924. In February 2012, the first infestation in a natural stand of hemlock in Ohio was discovered in Meigs County. Since then HWA has been found in hemlock stands in other eastern Ohio counties as well. hwa

Spongy Moth (formerly Gypsy Moth)

The European spongy moth (Lymantria dispar dispar) is a non-native, invasive species that has been advancing into Ohio from Pennsylvania and Michigan for years. In its caterpillar stage, it feeds on the leaves of over 300 different tree and shrub species and is especially fond of oak. A healthy tree can usually withstand only two years of defoliation before it is permanently damaged or dies. To date, 51 of Ohio's 88 counties have established populations. gypsy moth

Spotted Lanternfly

The spotted lanternfly (Lycorma delicatula) is an insect native to China, India, and Vietnam, and feeds on fruit, ornamental, and woody trees, including tree-of-heaven (Ailanthus altissima). Spotted lanternfly was first detected in eastern Pennsylvania in September 2014 and was likely brought to the United States by imported woody plants, wood products, and other commodities. They have now established populations in several eastern states, including Ohio. Residents are advised to be on the alert for this pest and report any possible sightings. State quarantine rules were implemented in October 2021 to restrict movement of regulated materials into or through non-regulated areas. spotted lanternfly

Walnut Twig Beetle & Thousand Cankers Disease

Thousand cankers disease (Geosmithia morbida) is a fungus which attacks the black walnut tree. This fungus is transmitted by the Walnut Twig Beetle (Pityophthorus juglandis), and is mostly found in Western United States. The Ohio quarantine rules were rescinded in October 2021. tcd

Invasive Plants

In order to protect native plant species and thwart the growth of invasive plant species, 38 plants have been declared invasive in Ohio. No person shall sell, offer for sale, propagate, distribute, import or intentionally cause the dissemination of any invasive plant in the state of Ohio.

Currently, callery pear (Pyrus calleryana) can be sold until January 2023.

Shipments to other states:
Many other states also have regulations prohibiting or restricting the sales of certain plants that have been deemed to be invasive or noxious. Please check with your nursery inspector if you have questions about shipping plants out of Ohio and to ensure you have the most current lists of prohibited invasive plants.

For the current list of invasive plants, see OAC 901:5-30-01. A five-person invasive plant advisory committee will review potential future additions to the invasive plant list. The following plants are designated as invasive in Ohio:

  • Ailanthus altissima, tree-of-heaven;
  • Alliaria petiolata, garlic mustard
  • Berberis vulgaris, common barberry;
  • Butomus umbellatus, flowering rush;
  • Celastrus orbiculatus, oriental bittersweet;
  • Centaurea stoebe ssp. Micranthos, spotted knapweed;
  • Dipsacus fullonum, common teasel;
  • Dipsacus laciniatus, cutleaf teasel;
  • Egeria densa Brazilian, elodea;
  • Elaeagnus angustifolia, russian olive;
  • Elaeagnus umbellata, autumn olive;
  • Epilobium hirsutum; hairy willow herb;
  • Frangula alnus, glossy buckthorn;
  • Heracleum mantegazzianum, giant hogweed;
  • Hesperis matronlis, dame's rocket;
  • Hydrilla verticillata, hydrilla;
  • Hydrocharis morsus-ranae, european frog-bit;
  • Lonicera japonica, japanese honeysuckle;
  • Lonicera maackii, amur honeysuckle;
  • Lonicera morrowii, morrow's honeysuckle;
  • Lonicera tatarica, tatarian honeysuckle;
  • Lythrum salicaria, purple loosestrife;
  • Lythrum virgatum, european wand loosestrife;
  • Microstegium vimineum, japanese stiltgrass;
  • Myriophyllum aquaticum, parrotfeather;
  • Myriophyllum spicatum, eurasian water-milfoil;
  • Nymphoides peltata, yellow floating heart;
  • Phragmites australis, common reed;
  • Potamogeton crispus, curly-leaved pondweed;
  • Pueraria montana var. lobate, kudzu;
  • Pyrus calleryana, callery pear (effective January 2023);
  • Ranunculus ficaria, fig buttercup/lesser celandine;
  • Rhamnus cathartica, european buckthorn;
  • Rosa multiflora; multiflora rose
  • Trapa natans, water chestnut;
  • Typha angustifolia, narrow-leaved cattail;
  • Typha x glauca, hybrid cattail;
  • Vincetoxicum nigrum, black dog-strangling vine, black swallowwort

Noxious Weeds

There are over 25 prohibited noxious weeds in Ohio; these are weeds that reproduce by seed, spread by roots, underground stems, or other reproductive parts, and, when established, are highly destructive and difficult to control. No one can sell any agricultural, vegetable, or flower seeds if they contain the seed of a prohibited noxious weed. Ohio law also gives local jurisdictions the authority to control prohibited noxious weeds when found.

For the current list of prohibited noxious weeds, see OAC 901:5-37-01. There is also a list of prohibited and restricted weed seeds, which can be found at OAC 901:5-27-06. The following plants are designated "prohibited noxious weeds":

  • Apple of Peru (Nicandra physalodes)
  • Canada thistle (Cirsium arvense)
  • Columbus grass (Sorghum x almum)
  • Cressleaf groundsel (Senecio glabellus)
  • Field bindweed (Convolvulus arvensis)
  • Forage Kochia (Bassia prostrata)
  • Giant Hogweed (Heracleum mantegazzianum)
  • Grapevines (Vitis spp.), when growing in groups of one hundred or more and not pruned, sprayed, cultivated, or otherwise maintained for two consecutive years
  • Hairy whitetop or ballcress (Lepidium appelianum)
  • Heart-podded hoary cress (Lepidium draba sub. draba)
  • Hedge bindweed (Calystegia sepium)
  • Japanese knotweed (Polygonum cuspidatum)
  • Johnsongrass (Sorghum halepense)
  • Kochia (Bassia scoparia)
  • Kudzu (Pueraria montana var. lobata)
  • Leafy spurge (Euphorbia esula)
  • Marestail (Conyza canadensis)
  • Mile-A-Minute Weed (Polygonum perfoliatum)
  • Musk thistle (Carduus nutans)
  • Palmer amaranth (Amaranthus palmeri)
  • Perennial sowthistle (Sonchus arvensis)
  • Poison hemlock (Conium maculatum)
  • Purple loosestrife (Lythrum salicaria)
  • Russian knapweed (Acroptilon repens)
  • Russian thistle (Salsola Kali var. tenuifolia)
  • Serrated tussock (Nassella trichota)
  • Shatter cane (Sorghum bicolor)
  • Water Hemp (Amaranthus tuberculatus)
  • Wild parsnip (Pastinaca sativa)
  • Yellow Groove Bamboo (Phyllostachys aureasculata), when the plant has spread from its original premise of planting and is not being maintained