How to get rid of Privet for good?
How to get rid of Privet for good?
I've been at war with Privet. No matter what I do, the little bugger comes back in full force. How do I get rid of this relentless plant for good?
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You really need to define what's happening so we can understand what you need.
Are they new seedlings? Is it cut stumps resprouting? Are they large trees?
Where I work in cleared rainforest, Small leaf and Large leaf Privet are 2 of the most prevalent woody weeds throughout. I've probably removed over 100K through varying means. Would be good to know how many actually...
I think it's small leaf privet. It also goes by the name of "Chinese Privet" here. This is in the Southeastern US.
While there's plenty of annoying seedlings, the cut stumps are my main problem. They like to grow in the middle of other already established plants. I've even tried poisoning the stumps, which I hate to do but I felt I had no other choice. It still came back.
With herbicide, other than choosing the correct one, the most important part is the technique in application, the amount irrigated into the wound (without spillage), and how quickly it is done. I've seen plenty of people treat things and then step up to worse herbicides because they didn't do it properly in the first place. Ideally, you would learn how to ringbark (Americans use girdle but there are 3 types of American girdling under that definition that all relate to trees and no way to tell them apart), which would have removed all need for chemicals. It's too late now. The chemical free way from this point on is excavation or light/sugar starvation.
You've been suggested a drill and that is how most standing trees are done these days. Drilling into the roots and/or root plate is reasonably standard. Again, it's technique not just drilling holes deep into the tissue (waste of chem). I will edit in a pic that is somewhat related, you are conducting different works now but the pic would have been how it was done to start with. A chainsaw is fine, just a good irrigation of the correct chemical ASAP should have worked. Shallow drill holes with a 10mm-ish metal drill, staggered through roots that are shooting or alive, filling up the hole twice with chem (fill hole within a second or 2, wait, fill it up again before 15 seconds expires).
Here is our fact sheet on control methods:
https://www.daf.qld.gov.au/__data/assets/pdf_file/0020/77420/small-leaf-privet.pdf
Ignore the text, that's just me not cropping it properly:
This is very helpful. Thanks.
The reason you use a metal drill bit and not a wood drill as a wood drill bit pulls into the wood, the metal drill allows you to dictate how far you go with a in/out motion. Doing roots, you usually only have access to the top and a little bit of the sides so the cambium is quite thin, you can make small "cups" with the drill on the top and sides for "injecting" the chemical. Use a nozzle or spray bottle, a sauce bottle might work, a dropper etc. Don't spill it out of the cup you've made or it's wasted.
The secret to killing Privet is Metsulfuron but I wouldn't use that where any food production was happening. Privet hates Metz.