Is this a treatable fungus?

Question

We have many Poplar trees growing beautifully but I’ve noticed this year that one has a partial area at its base where a fungus-looking disease is growing. What is this and how can I correct the issue before it affects the whole tree? The leaves etc are all fine/healthy. Thank you

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Answer 1

That looks like Crown Gall...caused by bacteria. There is no cure, and infected trees must be removed completely so as not to spread to surrounding trees. This destructive disease has a treatment in the works, but it is not totally effective yet. This treatment includes a genetically altered close relative of the bacteria, called Galltrol. This article will offer more insight: https://www.gardeningknowhow.com/plant-problems/disease/how-to-fix-crown-gall.htm