We have three happy wanderers in the same garden bed, each around 2m apart, one is flourishing and the two others have barely grown and seem to be sick.
The look dry and seem to have cob webs in spots.
It's such a shame as we love the colours and screening they provide.
I have attached some photos.
Hugh,
My Happy Wanderer looks like it has the same disease as yours. It was doing well up to about 3 months ago, then the leaves began looking sickly, curling, capillaries became prominent, and some died. I have attached picture below.
I followed Gardening Australia advice about using a white oil - a solution of dishwashing liquid and sunflower oil - spray, b, but, the majority of the plant is still infected. I have also cut back about 2/3rds of the plant. If you hear any other solutions, I would be interested.
Thank you
Nick