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Crop Protection :: Pests of Citrus
Cottony cushion scale: Icerya purchasi

Symptoms of damage

  • Nymphs and adults suck the sap from leaves
  • Honey dew excretion
  • Development of sooty mould fungus

Identification of pest

  • Egg: White, ribbed masses that hold up to 800 red eggs
  • Nymphs: Are red with black legs and antennae
  • Adults: Are covered in white hair


  • Spray dormant oil in late winter before spring
  • Spray horticultural oil, if needed, year round
  • Apply mixture of manure compost tea, molasses, citrus oil
  • Garlic-pepper tea also helps
  • Natural predators usually keep this insect in check
  • Control ants and dust which can give the scale a competitive advantage
  • Field release of vedalia and Australian ladybugs
Cottony cushion scale

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