Almost a miracle product. Simply spray onto the green surface of the paving and leave. It takes a few days to work but, in our experience, generally kills it all and, what is more, stays on the surface to keep killing new infestations for a couple of months.

Can be used as a pre-treatment [but wash off area thoughly before applying sealer] or as an autumn treatment on sealed surfaces.

Dilutes up to 1:3 so covers a huge area.