We recently bought an additional 20 acres and with it we inherited a large infestation of Spotted knapweed. I have seen a plant here and there in other areas of our 45 acres so I knew it was not contained and we had to deal with this immediately. Much like I handled the research for the cool season grass and bindweeds, I did the same with this. Hopefully, this will help others who have problems with this invasive. [Read more…] about Spotted Knapweed (Centaurea maculosa)
We have discovered two types of bindweed in our plantings – Field bindweed (Convolvus arvensis) and Hedge bindweed (Calystegia sepium). This isn’t good news when some researchers have called Field bindweed the 12th and the 10th “worst weed in the world”. (Pfirter, Mitich) Field bindweed has the status of a serious weed in 14 countries and a problem weed in 19 countries. Both plants have the ability to vine up other plants as they grow; making it difficult to control without collateral damage. [Read more…] about Bindweeds
What is ecological restoration? Some define it as returning the land to pre-settlement conditions, which in Wisconsin is pre-1830. Some define it as unnecessary work because they believe that “nature knows best” and to just let “nature take its course.” If we are to preserve the biodiversity that remains on our planet, we need to expand our definition beyond these archaic and fantastical notions. Perhaps a better definition would be creating habitat that is useable and functional so that a diversity of biota are able to thrive. [Read more…] about Going “au naturale”
We did a cut and treat method in the fall of 2013 after the Canada Goldenrod (Solidago canadensis) had bloomed. It appeared to be successful after a weeks when we could see the plants were dying but the real test was what would happen a year later. You can check out the original blog post. [Read more…] about Treating Canada Goldenrod – Follow Up
We found an effective treatment method for Canada goldenrod that works very well for small areas and reduce collateral damage to virtually nil. Once an area is treated, it helps to overseed the area. Give it a year or two before you burn or mow the area. These disturbances the following year stimulate the Canada goldenrod.
Our goal is to minimize the amount of Canada goldenrod we have. We have no illusion that we will ever eradicate it!
We use a 20% glyphosate solution (in water) and cut the flowering Canada goldenrod about waist high then dabbed the cut stems with the herbicide soaked trim brush.
By using a painting trim brush (one that is not a sponge) and a tallish container for the herbicide, we found we could gather enough herbicide in the brush without dripping it. Tap this on the cut end and it has complete coverage without dripping – no dripping down the stem and no dripping from the herbicide container to the cut end! We used a tallish container so the brush would stand upright and the handle would not slip down into the herbicide.
Canada goldenrod dead after a month
On August 17, 2013, we did a test in a small area to see how this would work. Within a week, we were seeing results. On September 4, 2013, this is how one of those test patches looks! You can see from this picture that we would have had a lot of collateral damage with the spritzing method.
The results show this system works and minimizes collateral damage!This technique can work for a person working alone. Using a fanny pack, I was able to find a tallish screw-lid glass jar that would fit in it. I had to cut the handle of the trim brush slightly to fit inside the jar. When I wasn’t cutting, the herbicide and the trim brush were secure in the fanny pack with the lid on.
Results after one year
Here’s a couple of photos I took on 30 July 2014 of the area that was thick with Canada Goldenrod. As you can see, there is no Canada Goldenrod!
Our analysis is that this treatment worked. Best of all, it’s minimal effort, minimal herbicide, and minimal collateral damage.
Why we use dabbing and not spraying
Let me describe our process of arriving at this treatment. We tried cutting it with a handheld pair of hedge trimmers then spraying it with a 20% glyphosate solution but the spray caused too much collateral damage. We thought we could minimize this by surrounding the Canada goldenrod clones with cardboard and just lightly spritzing the tips with a downward angle on the bottle but you can see from the picture how much overspray occurs. I would not recommend this type of treatment.
It seems that Queen Anne’s lace (Daucus carota) (QAL) is blooming early this year. Maybe with the wet spring, it got a head start, too. Either way, Jim and I have spent several hours a day for several days pulling this aggressive, weedy, non-native plant. [Read more…] about Queen Anne’s Lace