Control of the Disease

The control of this disease on isolated specimens of Leptospermum scoparium presents no difficulty. It has been found that spraying once a year during the winter months with an oil emulsion is sufficient to kill the scale insects. This removes the source of nourishment of the fungus and prevents further growth. It has been found necessary to spray each year as the trees are readily reinfected with coccids. Naturally it would not be practicable to utilize this spraying technique in protecting manuka on isolated hill country where difficulties of access and topography would preclude the use of standard equipment.