grassland restoration network

Save the Date!

Grassland Restoration Network Workshop

July 11-12, 2017

Join us at Konza Prairie Biological Station in Manhattan, KS for overview and field presentations on long-term plot and watershed-level studies in grassland ecology. This year’s workshop will focus how science at this National Science Foundation-funded Long Term Ecological Research (LTER) site has deepened our understanding of drivers influencing pattern and process in tallgrass prairie. Discussions will focus on how science can inform grassland restoration.

Details and registration information coming in April 2017

My comments on mowing honeysuckle are similar to fire.  You can’t kill honeysuckle roots by mowing it.  But you can reduce a huge shrub to a tiny re-sprouting shrub that can then be easily treated with herbicide. Mowing down the tall shrubs also stops them from producing fruits and hence seeds, and gives needed sunlight to other plants you are encouraging.  So mowing is great but follow up will eventually be needed.

When we encounter those big thickets of brush our first step is often to brush mow it with our tracked skid loader.  After mowing, the problem area is open and easier to manage.  Light can get to the ground, air can flow through the habitat working to reverse mesophication (increased shade and moisture changing the composition of the habitat to species liking those conditions).  Fire should be able to carry across the habitat.  It may take a few years for the herbaceous layer to grow back and support fire.   Photos are before and after brush mowing.

Pulling honeysuckle from the ground.

Below is an implement I have not tried.  You attach this to your skid loader and drive up to a shrub, grab it, and pull the shrub from the ground.  I am sure this kills the shrub.  I assume also it disturbs a fair amount of ground.  Try it in ruderal areas and let us know.

I have used foliar application on honeysuckle in the following manner.  On a fire break in a ruderal area with no native plants I had mowed down all sorts and sizes of honeysuckle and other woody plants.  The fire break was about 30 foot wide and maybe a quarter mile long.  I made a solution of 4 ounces of Progeny per gallon with 2% methylated seed oil.  I applied this mix with a boomless 50 gallon Kings sprayer from a 30 horsepower tractor.  After two months the application had a good kill on the smaller sized honeysuckle and other woody plants, and had set back the bigger plants, but maybe it was not  going to kill them.  I expect I should repeat that next year for better effect.  If I tried to do that job with a backpack sprayer it would have taken me days.

Another time to foliar spray honeysuckle could be when the plant is really short, like when they re-sprout after fire or mowing.  Let the plants emerge several inches and turn green.  I applied our 17% Garlon 4 basal bark mix to the leaves and stems of about 40 plants.  I painted a bit of blue on each one. All were dead after three months.  I bet I could have sprayed them with Progeny or glyphosate and also gotten good results.

So my bottom line is you can use foliar spray in ruderal areas or spot spray on short emerging honeysuckle.  Foliar spraying tall shrubs in good vegetation will yield a big circle of off-target kill.

I have two more posts on honeysuckle, one on mowing and one on  pulling it.

Some tips to apply basal bark herbicide:

Be careful applying these mixes in quality vegetation areas.  It is not only a brush herbicide, but a broadleaf plant herbicide. It kills forbs!

In nice areas tighten up your application method.  You can leave the pressure very low on the pack, and just gently press the trigger to get a minimum of herbicide on the stems.  Or use a paint brush or paint sponge and carefully wipe the stems with the mix.  You can also cut the shrub and dab on some mix this way, but the cutting is not necessary.  You can wire a sponge to the tip of your backpack sprayer wand and then dab or wipe the mix with little dripping and no overspray.  Don’t drip herbicide on good plants.

I generally don’t apply basal bark mix on hot days because it volatizes and perhaps harms nearby good plants.  In good areas don’t apply unless it is sweater weather or cooler.

Mark some plants with tree marking paint so you can do your own testing. It is fun.

Expect to return to the area several years in a row to treat the ones you missed.

Expect to get some off target kill within 2 to 8 inches of the stems you sprayed, depending on how carefully you sprayed.

While treating honeysuckle also treat the autumn olive, buckthorn, and mesophytic trees like box elder.

Typically, I apply the mix to all the stems and all sides of the stems.  When there is thorny brush in the way I don’t worry about getting all the stems treated.

Go after the scattering of shrubs in a field before worrying about the huge thickets.

Wear safety glasses.  Folks who wear prescription glass might get side shields for the frames or wear goggles over your glasses.

Bring some paper towels to clean up.  Some rubber gloves for when you are filling your pack or fiddling with the pack.  Once you have got the pack working good you can go back to your thicker and warmer gloves.

Don’t fill the pack all the way.  Halfway is plenty and will last a long time.

Take your time.  You are going way faster than those folks cutting the shrubs.  You can whistle while you work while they are still back at the shop preparing their chainsaw.

Elsewhere, I describe how to take care of your Birchmeier pack.

This year, we ramped up our basal bark solution on the advice of Rick Schulte of Crop Production Services.  We increased the Garlon4 from 17% to 20%.  And we add one quart of Vanquish herbicide to each 12.5 Gallons of mix.  Others have adopted this mix so I am trying it out.

Future research question.  If I basal bark honeysuckle in winter, say January, does an April fire that top kills the stems still kill the root of the shrub?  My current sense is yes, but I don’t have the data.

I sometime hear colleagues say basal bark on invasive honeysuckle “sort of” works.  I find basal bark with Garlon4 kills nearly all of the time.

Note in the photo below the blue tree marking paint I applied to the stem.  In the fall, October 10, 2015,  I sprayed a little basal bark solution on the lower stems of this plant and about 50 others.  By marking the stem with paint I can return later and see that indeed the plant is dead.  If I took you to this area and exclaimed that I basal barked the shrubs you might say it “sort of” works.  You would say that because there would be live honeysuckle here, there, and seemingly everywhere.   That would be until I pointed out that every shrub I herbicide sprayed and then marked with paint is dead.  There are shrubs around the treated plant that are not dead because they were not sprayed.  The plants sprayed are dead.    So applying basal bark in October with the leaves still on worked.   In my next post, I will tell you about a spring application.