Various small homopterous insects of the superfamily Coccoidea that suck the juices of plants and the females of which secrete and remain under waxy scales on plant tissue.
Scale insects are circular in
shape and sticky to the touch. They range in colour from white to
brown to black.
A brown variant of Scale insect
in the rosette of Tacitus bella.
The white scale that
appears on Aloes and Euphorbias form a white coloration on
the outer leaves. The infestation unsually begins at the base of the
leaves and then spread up towards the tip. These pests, if left
unchecked, will destroy the plant and it may spread viral infections from
one plant to the other, these viral infections usually will kill the plant.
White scale on Aloe framesii, fatal if