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Originally Posted by .:4:.
Poisoning parts doesnt rid the issue. It may kill part of the section of root. But being that of a weed, its crafty and like a virus, it just turns into sections. I have previously dug up and ripped out a section of the runner. Problem being the bit i pulled i couldnd go any further as it went under my turning circle. Im not breaking up concrete just for a wandering anything.
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The best way is drilling and poisoning before the tree is cut down and leaving it until it dies. That way it's still photosynthesizing and pumping sap, spreading the poison to every area.
We deal with some stubborn ones, jap pepper, wild olives and yes if you cut then poison the roots just sucker and it makes the problem even worse. Your also killing any seeds that could drop when you lop it by poisoning first.