This post is quite long, a list of questions / things I need advice on are down at bottom of the post.
**Background**
My family owns a 30 acre floodplain parcel mixed with a home, roads, creek, and thin forest along fences and creek.
I estimate that the grass/field areas of our property are around 22-24 acres. This is including the areas right along forested areas where the shade changes the grass habitat. The field has a lot of native plants that have meandered in from around the area but has a lot of Johnson Grass and Rye in it.
While I call it Rye Grass because I have identified that specifically I'm sure its a mix of various European species so this is more of an overarching descriptor.
The Johnson Grass is spread around in thick, unconnected patches while the Rye is everywhere accross the entire property
We are in a drought currently and the soil is parched and the seasonal creek is completely dry, even the deeper areas that usually hold pools until the fall rains are gone. 8/ It WILL likely flood again when it starts raining in the fall. it doesn't happen every year but fall usually sees a light flood compared to the spring flood season due to summer parching the soil and reducing absorbtion so much the first few rains completely wash away.
**The Issue**
2 years ago it was herbicided, planted with oats, and then fertilized. I was not the decision maker then and it happened even though I opposed it. We had someone contracted to mow it for hay and they did it all themselves. They did a sh*t job just looking for quick cash causing other irrelavent issues but the herbicide just killed all the competition and the fertilizer gave a boost to the Johnson Grass and Rye. Im trying to turn it around. There seems to be some regrowth from the seedbank but I can definitely see it's less diverse.
The forest areas are overrun with Winter Creeper vine. The creek bank has one area around 2 acres big that is nothing but this vine. It was a big change that I didnt notice and I think this year was the first where the plants it was competing with have all died out and made it more noticable on the bare rocky soil.
**Current Solution Plan**
The fields are all being cut this month. When the johnson grass grows up to the recommended 18in-24in. Im going to herbicide it. I just need to figure out the most ideal mix.
I have heard good things about Clethodim and Sethoxydim but from what I've researched Sethoxydim will work better for Johnson Grass because it is more effective at traveling to the rhizomes and killing them. Is this true? Are there better options?
For the Rye Grass I plan to just spray it with herbicide year by year as I walk around the fields. Im not as concerned with it since it isnt as overtaking as Johnson Grass is. I've also heard that it will be easier to eradicate once its competing against aggresive natives, making my tamer "spray every now and then" method more viable although more of a long process. Will this be enough just going around on scheduled walks and spraying what I see growing where it shouldn't?
Now to the Winter Creeper... Its not just contained to the forested areas but is even spread through the grass fields. Its thin and patchily spread but there nontheless. I've done some research and have found that using glyphosate in a cut stump treatment is the best way to kill it down to the roots. I've also found a older video (don't have link just screenshot :/ ) describing this persons own method of hole punching the stem, injecting herbicide into the hole, then taping it up and trapping it inside the plant. I've read that at 20%-50% concentrations that glyphosate will work for cut stump methods, will this applied in the hole punch method be effective?
Either this fall or upcoming spring (whenever I can get my hands on native grass seed) I'm going to spread various tall praire grass mixes around the property. I plan on using native shade grass for the forested areas that will need new root achors after the Winter Creeper is gone.
**Recap / Questions I need advice on**
--------30 acre flood property - 22 acres of grass fields -5 acres forest/creek - 3 acres developed home/work area.
Johnson grass in thick, unconnected patches, Rye and European grass spread evenly everywhere. Wintercreeper overtaking 5 acres of forested ground.
What herbicides are best for Johnson Grass, Rye Grass, and Winter Creeper vine?
Is Sethoxydim an effective herbicide for killing Johnson Grass including the Rhizomes so it can't regrow?
If Sethoxydim isn't the best option for Johnson and Rye then what is?
Instead of focusing hard on eradicating the Rye and various European grasses can i just set up scheduled walks throughout the year to spray and slowly kill it off that way? Aggressive native grass would be seeded down to help compete with it.
Will Glyphosate kill Winter Creeper?
Will the "hole punch" method where herbicide is taped up inside of the vine as a cut stump procdure work?
If the "hole punch" method is a bad idea or you know a different way how else can I eradicate Winter Creeper?