All Scale insects are difficult to control. Many of the insecticides from years past (which are still available) do not work any longer, as Scale insects are masters at developing tolerances and immunities to insectivides when are used repeatedly. Resulting from extensive research and trials, Tree Green’s insect management program consists of rotating insecticides and properly timed spray applications, which is the key to control.
The timing of applications and products used vary for each type of Scale. Rest assured that Tree Green’s 50+ years of experience dealing with different Scales will result in clearing up this situation!
It is important to note that even after a treatment or two, the shell of the Scale insect may still be present on the tree or shrub for a period of years. This does not mean that the insect is still actively damaging the tree or shrub! The Scale shells just need time to begin decomposing and ‘slough off’ the stems and branches naturally.