Stem Injection of Invasive Knotweed - Part II on Green Shoots Injection System

This video, part II of II, explains how to do stem injections of invasive knotweed using the Green Shoots Stem Injection System. It follows Part I • Stem Injection of Inva... , which answers key questions about whether stem injection is the right method for treating your invasive knotweed stand.
0:24 - Personal Protective Equipment - what to wear when doing a stem injection.
1:09 - Selecting the dose for injections - making adjustments with the dosage adjuster.
1:29 - The dose used with 54% glyphosate concentrate - aquatic herbicide.
2:18 - The dose with 41% glyphosate concentrate - non-aquatic herbicide.
3:11 - Filling the reservoir bottle with herbicide.
3:47 - Installing the needle.
4:34 - Choosing the path of treatment in the knotweed stand.
5:09 - Injecting in the stem, typically at the second node from the ground.
5:40 - Why you should inject just below a node.
6:03 - Marking the stems with a paint marker.
7:02 - Treating small stems that can't be injected, i.e., stems less than 1/2 inch in diameter.
7:14 - One treatment method for small stems is using our small foam herbicide dispenser to do a direct application of foam herbicide to the small stems.

[@iKate02]

I have been pulling and cutting my knotweed last year and this year so far. I am just discovering your page and decide that herbicides are a good idea. The knotweed starts at the front of my property and goes all the way back, it’s goes about the length of a basketball court and is probably 5 feet wide. It’s a lot of knotweed. It’s also growing on a very steep hill. I stopped pulling the knotweed a few days ago, should I let it continue to grow until this fall and then try the injection method? We are very close to our neighbor and her garden so I want to try and keep the herbicides contained as much as possible. I feel comfortable injecting the bigger stalks, but what do you recommend I do with the small stalks that are too small to inject that won’t spread herbicides everywhere?

[@GreenShoots]

Yes, definitely don't pull any more. You want the stems to be big enough to be injectable. Inject the large stems (above 1/2"). Then, apply herbicide to the small stems. Our small foam herbicide dispenser works well for this. Just apply to the stem about 5 inches above the ground and put two stripes of foam on opposite sides of the stem.