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LAC INSECTS: Globally, till date 99 species belonging to nine genera have been reported.

  • In India, there are 26 species under two genera, viz. Kerria and Paratachardina
  • They secrete a resin, a bio-resource of wide commercial utility.

Scientific Name:

  • Kerria lecca (Kerr.) in India
  • K. chinensis ( Mahdi.) in Assam and NorthEast India

Super family-Coccoidea


  • Resin (60-90%)
  • Dye (2-10%)
  • Wax (6%)


Food industries, coating of medicinal pills, cosmetics, paints, inks, automobiles, postal departments, electrical industry, chocolate and candy coating, perfumeries, dye for textile industry, slow- release lac coated urea
for controlled release of urea etc.

Adult female:

  • Pyriform body, size is about 4-5 mm, reproduction is ovoviviparous. It has three instars i.e. first, second (crawler
    stage) and adults.
  • Female laid 300-600 eggs within its cell.
  • The body is divided into head, thorax and abdomen. Head bears a pair of degenerated antennae.
  • Eyes are absent. Mouthparts are of piercing and sucking


  • Crawlers shape is ovate, crimson in colour & 0.59 mm in length.
  • After first moult, both male and female nymphs lose their appendages, eye and become degenerate.
  • Inside their cells, the nymphs cast off their second and third moult and mature into adults.

Adult male:

  • The male of K. chinensis undergoes complete metamorphosis. They have usually five instars i.e. first,
    second (crawler stage), pre-pupal, pupa and adult. An adult male is 1.2-1.5 mm in length
  • Head bears reduced eyes and ten segmented antennae.
  • Mouth parts are piercing and sucking type; however, it is true for female also.
  • Thorax has three pairs of legs.
  • The eight-segmented abdomen ends into a short chitinous prominent sheath
  • A pair of white elongated filament is present on either side of this sheath.

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