Black scale

Saissetia oleae
Recognizing black scale:

Adult black scales are round and spherical. Their scale cover has an H-shaped elevation pattern and is dark brown to black in color. Under the scale cover an adult female produces a lot of eggs. The crawlers that hatch from the eggs move away out of the scale cover and spread throughout the plant. Initially, they often sit on the younger parts of the plant. Later they mainly move to the more woody stems. The young stages are oval, flat and translucent yellow.

Damage black scale:

Black scale causes mainly cosmetic damage. At heavy infestations a huge amount of honeydew will be produced by the scales. In this honeydew the black sooty mould fungus starts growing which causes leaves to turn black. 

lifecycle black scale:

  • hundreds of eggs per female
  • 1 to 2 generations per year
  • egg - adult: variable, many months
  • males are winged and rare

host plants black scale:

  • Citrus
  • Olive
  • Oleander
  • Tropical fruit trees


Coccophagus scutellaris:

C. scutellaris