Dear Colleagues, We have extended the deadline for early registration for the IUFRO meeting, “Biological Invasions in Forests: Trade, Ecology and Management”, Prague (20-24 September, 2021 https://iufro.czu.cz/en ) through this Friday, 6 August. Late registration will be available through 31 August. Please contact me (aliebhold(a)gmail.com) if you experience problems with the online registration system. You do not need to register if you only wish to listen to the live-stream of the conference as this will be freely available. -Sandy Liebhold