In reply to Post #8
Previous weed control 11 years ago was done using Diquat trade name Reglone produced by Syngenta. Used at 5 litres per 8 acres sprayed into the outboard wake it cleared all aquatic submerged weeds at that time there was no duckweed. All the weed died off 2 weeks later and lakes have been clear till last year. EU banned Diquat in 2019 and all herbicide stocks were to be used by Feb 2020. This would have solved duckweed too but now withdrawn. Hence looking for alternatives.... products or trade names welcomed. Manual efforts are far too labour intensive!

One of our local pools has been infested with duckweed 2 years now anyone had any success getting rid on their lakes? Floating booms made of rope threaded pipe insulation and 2" plastic pipe wrapped in scaffold netting have worked well to drag it into a margin to net out but it grows back with a vengeance! There must be some product to spray it with safely so as not to kill fish or invertebrates. Any ideas guys?