weather was fine all day on each occassion. nothing added, just 25ml per litre of biactive. it seems to take three weeks to show and then has not done the job completely. i am conducting a trial on some weeds in the garden. adding 5ml of detergent per litre to one half and not to the other. the round up plus the detergent half is showing signs of dying off . the other half looks remarkably healthy after 2 weeks.
cheers
ged