The tree Ailanthus Altissima is called the tree of paradise here in the Marche. It is a pest as it seeds and suckers everywhere. I have now obtained “Roundup 450” which should kill it. This herbide is 4 times stronger than Tumbleweed. Problem is that it is sold in litre bottles and is aimed at a farmer’s market i.e. suitable for spraying on hectares (10,000 sq metres). From my calculations 10ml is sufficient for my garden.