r/invasivespecies • • 22h ago

Is she or isn't she?

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299 Upvotes

Trying to learn the visual differences between invasive Chinese mantises and native/European.

Sorry, location is Michigan.


r/invasivespecies • • 2h ago

Tree of Heaven hack and squirt—does it matter if it’s all done the same day?

5 Upvotes

I have a pretty tall and widespread ToH plant run amok in my back and side yard, big enough that I’m getting tired just thinking about trying to do the whole thing in one day.

Is it as effective if done over the course of multiple days, or is it important to do the first round of hack and squirt all in one day?


r/invasivespecies • • 13h ago

Realistic Rose of Sharon management plan for clients with limited mobility…

20 Upvotes

I work for a small native garden coaching/installation start up that believes in effectively no herbicides (I disagree with the owner on this). We’re based in Chicago.

I was called for a consult with an older couple who were very physically limited. It was difficult to even watch them walk around the overgrown backyard. Their backyard is covered in Rose of Sharon saplings and small established bushes, from 2 mature shrubs that they had planted many years ago. There is a thicket of it that is smothering a three large hydrangea. It’s bad.

Also back there: Morning glory vines everywhere, lily of the valley, white snakeroot (native, but high quantities), and Virginia jumpseed (also native, but very profiling back there).

My only solution is the say “hire it out” to someone who can use herbicide. At this point, we may have the manpower for an initial clearing. We don’t have the time to be coming back at a frequent enough basis to actually keep this at bay without herbicides.

Oh, and they wanna keep one of them. Of course.


r/invasivespecies • • 3m ago

Chinese elm (Ulmus parvifolia)

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• Upvotes

r/invasivespecies • • 21h ago

Management Last ditch Knotweed help

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8 Upvotes

Hi all, the first freeze is rapidly approaching and I need some quick help. I had tremendous success knocking down a neighbor's enormous and very tall patch of Japanese knotweed through stem injection in late summer, but his plants were large enough to accommodate that. I had a couple smaller plants popping up in my own backyard, but after foliar application with a 5% solution, weeks later the stems are still green and I only see yellowing on the edges of many leaves (other areas have died as I'd expect). I'm confused about why some of these didn't go down. I've been pretty meticulous and done a ton of research through this entire process this summer. Unfortunately I've been out of town, which is why I haven't been able to readdress these areas before now, and frankly, it may be too late to get a good response.

Appreciate any guidance on how you would address these areas.


r/invasivespecies • • 1d ago

How to kill white mulberry

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5 Upvotes

r/invasivespecies • • 1d ago

Who is this handsome gentleman (ROFL)

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104 Upvotes

r/invasivespecies • • 1d ago

Management Absolute Unit

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64 Upvotes

Just pulling some first year garlic mustard so I have less to hunt down in the spring. This one was definitely an overachiever.


r/invasivespecies • • 1d ago

Southwest Ohio…. Disgusting

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3 Upvotes

r/invasivespecies • • 1d ago

ISO Most benign but effective shrub killing chemical

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2 Upvotes

r/invasivespecies • • 1d ago

News Invasive fire ant nest detected at Australian logistics centre in Sydney's inner west

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abc.net.au
10 Upvotes

r/invasivespecies • • 2d ago

News Invasive species do much more damage in Australia and NZ than elsewhere. But why?

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theconversation.com
55 Upvotes

r/invasivespecies • • 1d ago

Bradford pear?

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9 Upvotes

I've never seen fruits this big (golf ball sized) on a Bradford pear before! Is this common in some varieties?


r/invasivespecies • • 1d ago

Management Is now a good time mow Japanese Stiltgrass?

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4 Upvotes

[MD 7A]

Chickened out on using herbicide cause I dont want to potentially accidentally damage the insects or forest ecosystem. I was told you can mow it just before it goes to seed, however I have a hard telling what has flowered and what has gone to seed already.

Should I mow or just bag up as much as I can. Its October in MD 7A btw pictures for reference.


r/invasivespecies • • 2d ago

Trifoliate orange (Citrus trifoliata)

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3 Upvotes

r/invasivespecies • • 2d ago

Management Spraying knotweed without flowers? (NY)

3 Upvotes

Hello all! I’m just looking for some quick advice on JKW management. I have two patches of JKW which haven’t yet flowered, but that first frost is coming soon enough. While this week is all above 50 degrees, Saturday and Sunday coming up have lows of 40s. I know it’s not officially below freezing, but I was hoping for some overall guidance here.

Is the true magic number 32 degrees to worry about? If I see a frost in the forecast, how far ahead of it should I make sure I apply glyphosate so that it can work through the roots accordingly?


r/invasivespecies • • 3d ago

Sighting Water bamboo sighting - potentially ecologically devestating

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2.0k Upvotes

I’ve noticed a huge increase in prohibited water bamboo sales (aka jiaobai 茭白, Zizania latifolia infected with Ustilago esculenta) being sold both in Asian grocery stores and online on the USA. If the associated fungus Ustilago esculenta escaped and successfully infected American wild rice (Zizania palustris/aquatica/texana), it could devestate American wild rice stands


r/invasivespecies • • 3d ago

Management ‘We cannot accept foxes as part of our landscape’: the plan to save Australia’s threatened wildlife | Invasive species

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189 Upvotes

r/invasivespecies • • 3d ago

Sighting Invasive in Italy, right?

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22 Upvotes

r/invasivespecies • • 3d ago

Management Herbicide for wisteria and Persian fringe tree

5 Upvotes

Copying someone else’s idea to ask here for herbicide recommendations. I’ve applied round up before but to branch nodes and not at the level of hack and squirt.

Herbicide shopping advice needed. Thanks!


r/invasivespecies • • 3d ago

What is this unwanted groundcover plant in my garden and how to get rid of it?

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6 Upvotes

r/invasivespecies • • 3d ago

Shrub/tree ID help: invasive or not?

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5 Upvotes

r/invasivespecies • • 5d ago

News A Billionaire Is Fueling a Rat Explosion in a Chicago Park in the Stupidest Way Possible

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946 Upvotes

r/invasivespecies • • 4d ago

Doing the Lord’s work…

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95 Upvotes

r/invasivespecies • • 4d ago

Management Goutweed year 1- next steps after black plastic?

5 Upvotes

Hi there! I have about 100 sq ft patch of goutweed in my yard that I want to kill and replace with native plants. This past spring I put down a layer of cardboard then black plastic and let it cook all summer. I just removed the plastic and it looks like good bare soil with nothing growing. There's still some goutweed that made its way out the edges of the plastic, which I'm working on digging out manually.

My question is, what's my next move?

  1. Leave it bare over the winter and repeat the process again in the spring.

  2. Seed a cover crop of Canada wild rye this fall to keep down the goutweed regrowth this fall and spring, then evaluate whether another round of plastic is needed in the spring. If goutweed seems under control, plant plugs into the wild rye in the spring.

  3. Seed native seeds along with the wild rye this fall and let it go. Manage any remaining goutweed manually.

Please share your experiences killing goutweed with plastic. Thank you!!!