Ohio State University Extension Bulletin 866-98

Identifying Noxious Weeds of Ohio

Bulletin 866-98

Additional Weed Regulations in Ohio

Lythrum salicaria (Purple Loosestrife)

A permit is required from the Ohio Department of Agriculture to sell or plant Lythrum salicaria. The permit allows the sale and planting of sterile varieties of Lythrum that do not threaten native habitats.

Multiflora Rose

Multiflora rose may be used by licensed nurseries as rootstocks for other rose species. To use this plant for any other reason, a special permit is needed from the Ohio Department of Agriculture. Multiflora rose is a thorny and invasive woody plant. It is difficult to eliminate once established. Note: multiflora rose can be distinguished from other roses by the presence of fringe-like stipules at the leaf bases.

Multiflora rose

Multiflora rose was introduced to the U.S. in the 1950s as wildlife
cover and was also marketed as a "living fence." Since then it has
become a thorny problem in pastures, fields and other open areas.

Ohio Noxious Seed Law

Ohio also has a noxious seed law, enforced by the Ohio Department of Agriculture. It prohibits certain weed seeds from being present in crop seed. Most of the prohibited species are troublesome perennials that spread quickly and weeds that have not yet been introduced to Ohio. For a list of weeds prohibited in commercial seeds, contact the Ohio Department of Agricultures Division of Plant Industry. Lists are available of weed seeds which are prohibited in crop seed (primary noxious weeds), and weed seeds which are not allowed to exceed 0.25% of a crop seeds weight (secondary noxious weeds). No crop seed may contain weed seed of any kind exceeding 2.5% by weight.

Extension Guides to Weed Control

These guides are available from your county OSU Extension office. Many are also available on-line at Ohioline, Extension's website:


Weed Control Guide for Ohio Field Crops, Bulletin 789
Corn, Soybean, Wheat and Alfalfa Field Guide, Bulletin 827
Ohio Agronomy Guide, Bulletin 472
Controlling Weeds in Nursery and Landscape Plantings, Bulletin 867
Control of Turfgrass Pests, Bulletin L 187
Lawn Weeds and Their Control, Bulletin NCR 26
The Ohio Vegetable Production Guide, Bulletin 672
Midwest Small Fruit Pest Management Handbook, Bulletin 861
Ohio Christmas Tree Producers Manual, Bulletin 670
Ohio Herbicide Selector Software

Quick Guide to Weed Regulations in Ohio Law

907.10 - outlines the duties of the Director of Agriculture, one of which is to establish primary and secondary noxious weeds.

731.51 - 731.53 - gives municipal corporations the authority to eliminate noxious weeds from properties.

927.681 - regulates multiflora rose.

927.682 - regulates purple loosestrife.

4959.11 - gives managers of toll roads or railroads authority to destroy certain listed weeds and brush.

5579.04 - 5579.08 - gives highway departments and township trustees authority to control noxious weeds.

901:5-31-01 - lists details of noxious seed law.

901:5-37-01 - lists prohibited noxious weeds.

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