Dave Liquorice wrote:
Try some fine branching birch twigs stuck in the ground every 6 to 8"
or fine dark coloured string/cotten thread tied between sticks a few
inches above the ground.

Thanks, Dave. Have covered all the inbetween areas of the garden with
bark (very good-looking landscaping variety), so don't want to mar the
effect. Will give the apple a go.

Eddy.