Monthly Archives: June 2013

“Identifying and Controlling Invasive Plants” program offered to woodland owners in SE Ohio at the Vinton Furnace State Forest on Friday, July 12th


Are you seeing new plants encroaching on your woodland property in southeastern Ohio but don’t know what they are? Do you already know about invasive plants but don’t know how to control them? The program “Identifying and Controlling Invasive Plants” will take place at the Vinton Furnace State Forest, near McArthur, on July 12 from 9 am to 3:30 pm.

This landowner program is designed to help them learn how to identify and control common invasive plants in their woodlands. Throughout the day there will be opportunities to visit sites outdoors with invasive plant specialists to see these plants and see demonstrations of various control techniques.

“Identifying and Controlling Invasive Plants” and the “2nd Friday Series” are sponsored by the Education and Demonstration Subcommittee of the Vinton Furnace State Experimental Forest with support from the ODNR-divisions of Forestry and Wildlife, US Forest Service, Vinton County Soil and Water Conservation District…

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Researcher looks for honeysuckle blight

A message from Dr. Richard L. Boyce:
As I noted last year about this time, this year I’m again seeing a lot of honeysuckle leaf blight on Amur honeysuckle (Lonicera maackii) in the Cincinnati area. One additional wrinkle is that I’m now seeing it in an area where I’ve also found a lot of dead honeysuckle. This is an area called Woodland Mound Park, just east of Cincinnati, where I’ve been working since 2005. I did not collect data there last year, so I don’t know if the leaf blight led to these particular honeysuckles dying, but let’s just say that circumstantial evidence is high, since there was a lot of blight all over the area last year. This is also the first time I’ve seen enough dead honeysuckles to notice (mainly medium-sized bushes a few feet high).

Once again, I’ve mainly seen the blight on vigorous growth, i.e., on stems that haven’t yet lignified.

I would ask you to again report any sightings of leaf blight you see on any honeysuckle species. I’ve included a couple of pictures that may help. I spent the last two weeks in in New England, where I mainly saw Tatarian and Japanese honeysuckle, and I didn’t notice any leaf blight there.

Richard L. Boyce, Ph.D.
Director, Environmental Science Program
Department of Biological Sciences, SC 150
Northern Kentucky University
Nunn Drive
Highland Heights, KY 41099 USA

859-572-1407 (tel.)

Volunteers needed in the Ohio River Basin to map purple loosestrife

Picture1CHIP-N (the Central Hardwoods Invasive Plant Network) is a partnership between the Appalachian Ohio Weed Control Partnership, River to River Cooperative Weed Management Area, and Southern Indiana Cooperative Invasive Management. CHIP-N and the Ohio River Basin Fish Habitat Partnership are working together to coordinate the volunteer mapping of purple loosestrife in the Ohio River Basin. This data will help local and regional managers determine the best management strategies and identify possible biocontrol release points. Purple loosestrife is very easy to identify from July-September and would take minimal effort to report it while conducting other activities (water sampling, surveying, canoeing, hiking, etc). If you are interested in participating, please contact Eric Boyda (, 740-534-6578) and he will forward you on more information about what data to collect and how to easily identify purple loosestrife.

This is a great opportunity for organizations to get volunteers interested in reporting and mapping invasive species and possibly expand their programs in the future to include more or different species. Please forward this on to anyone you think would be interested.

AOWCP success: invasive plant scavenger hunt

On Saturday June 8th, the AOWCP set up an invasive plant scavenger hunt for children for the Play Outside Weekend on the Wayne National Forest in the Leith Run recreation area (Washington County).  We had a lot of fun working with the children and their parents (approximately 30 children, 20 adults), and I think everyone learned quite a bit about invasive plants.  It was rewarding to find out that many of the children there already knew what invasive organisms were.  Repeat messaging works, and it’s important that we keep youth informed.


Evan Siembida, a summer intern from Hocking College, stands infront of our display at the scaveger hunt starting point.

Phenology updates: bush honeysuckle, Japanese stiltgrass, hairy jointgrass, hydrilla, orange daylily, and bohemian knotweed


Bush honeysuckle (Lonicera spp.)– fruiting, green berrys


Japanese stiltgrass (Microstegium vimineum) – has germinated and is anywhere from 1 to 6 inches tall.  This link might help ID it


Hairy jointgrass (Arthraxon hispidus) – germinated, around 1-4 inches tall.  Here is a link to help identify it


Hydrilla (Hydrilla verticillata) – has emerged

Orange daylilies (Hemerocallis fulva) – flowerbuds forming


Bohemian knotweed (Polygonum x bohemica) – Hybrid between japanese knotweed and giant knotweed.

Aquatic Invasive Species Webinar Series


Aquatic plants in water gardens and along the edges of lakes, ponds, and streams are gaining popularity with many gardeners. These “wet-loving” plants can bring terrific visual appeal and drama to the residential landscape, but some species have invasive tendencies that threaten the ecology of our natural areas.

If you’re a water garden hobbyist or interested in becoming one, this two-part webinar series is for you. In the first webinar, you will learn about aquatic invasive plants and the problems they can cause, how science is being used to assess the ecological risk behind exotic plants, and practical steps you can take to prevent the spread of aquatic invasive species.

In the second webinar, you will learn about design techniques for creating spectacular aquatic landscapes, and about non-invasive aquatic plants that can be used in place of invasive species.

The Science Behind Aquatic Invasive Plants

An Overview of Aquatic Invasive Plants
Greg Hitzroth, Organisms in Trade Outreach Specialist, Illinois-Indiana Sea Grant and Illinois Natural History Survey

Assessing the Ecological Risk of Aquatic Plants
Reuben Keller, Assistant Professor, Loyola University Chicago

Preventing the Spread of Aquatic Invasive Species
Greg Hitzroth, Organisms in Trade Outreach Specialist, Illinois-Indiana Sea Grant and Illinois Natural History Survey

Building a Better Water Garden

Creating Beautiful and Environmentally Responsible Water Landscapes
Heidi Natura, Founder and Partner, Living Habitats

Alternatives for Invasive Aquatic Plants
Bob Kirschner, Curator of Aquatic Plant & Urban Lake Studies, Chicago Botanic Garden

link to register:

Help stop hydrilla from invading Ohio’s inland bodies of water

5392216Have you been noticing the dense thick mats of vegetation growing along the Ohio River? You probably have fouled your motor boat prop while boating through it or noticed your favorite fishing spot being overrun. If given the opportunity, hydrilla will overrun almost any body of water.

Thought to be native to India and Korea, hydrilla (Hydrilla verticillata) was first introduced to the U. S. in the 1950s for use in aquariums. Some of the hydrilla spread can be attributed to aquarium hobbyists discarding unwanted aquarium systems into natural water bodies. However, hydrilla is mostly spread by vegetation fragments that get caught in boats and boating equipment. Since the 1950s, hydrilla has spread throughout much of the United States where it is confined to slow-moving, freshwater bodies, such as the Ohio River and the Florida Everglades.

5345046Hydrilla affects the ecosystem by altering water chemistry, which can lead to large fish-killing events. It requires less sunlight to produce food, giving it a competitive advantage over native vegetation; in addition, it grows in a dense mat that shades-out other submersed plant species. Hydrilla reduces water flow by clogging irrigation and flood-control canals and culverts; and has become a major obstacle in hydroelectric generation. Economic costs of hydrilla are estimated in the millions due to lost recreational opportunities, and maintenance costs associated with irrigation and hydroelectric works.

5396743To identify hydrilla, look for submersed plants forming dense mats at the surface of the water.  Leaves are small, green, slightly translucent, and often have saw-like edges. The mid veins of the leaves are often tinged red and have sharp teeth. Leaves are attached to the stem in whorls of 4-8, but predominately 5. Vegetation near the surface has a pipe cleaner like appearance that is approximately one inch in diameter. If the plant is dug up, a small potato like tuber can be found under the mud.

Because colonies often start near boat ramps, it is important to prevent the transportation of this nuisance species and clean all recreational equipment.  When you leave a body of water:

  • Remove any visible mud, plants, fish or animals before transporting equipment
  • Eliminate water from all equipment before transporting (motor, livewell, baitbucket, boots, and waders)
  • Clean and dry anything that came in contact with water (boats, trailers, equipment, clothing, dogs, etc) with hot water that is at least 104 degrees (for dogs, use as warm of water as possible and brush its coat) or a high pressure sprayer.  If possible, allow to dry for 5 days before moving to a new body of water.
  • Never release plants, fish, or animals into a body of water unless they came out of that body of water.

More information about hydrilla can be found at:

King County:

 University of Florida’s Center for Aquatic and Invasive Plants:

Washington State Department of Ecology:

To report any inland populations of hydrilla not on the Ohio River or to have any additional questions answered, contact Eric Boyda at or 740-534-6578.   

Phenology updates: moneywort


Moneywort (Lysimmchia nummularia) – flowering