The Agrobacterium tumefaciens bacterium causes irregular woody masses known as crown galls to form on the roots, trunks or branches of various species of tree including the Horse-chestnut.
Wherever suitable host trees are found.
All year round.
Status in Britain not known.
Status in Leicestershire and Rutland not known.
Leicestershire & Rutland Map
Enter a town or village to see local records
Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015