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INSECTA
PARASITES



Phthiraptera Introduction

Arthropod Classification - copyright nabrown RVC

Mallophaga

Also known as chewing lice or biting lice

Anoplura

Also known as sucking lice

Life Cycle

Pediculosis

Cattle

Sheep

Pigs

Horses

Dogs

Cats

Poultry

Control

  • Few insecticides will kill lice eggs on the animal
  • Two treatments are needed to kill nymphs emerging from eggs at the time of the initial treatment and those that will emerge 2-3 weeks later
    • At two week intervals
    • Or a product with a two week residual activity can be used

Anopleura lice are more susceptible to systemic insecticide treatment than mallophaga lice

  • Resistance to insecticides may become a problem so alternating the chemicals used and avoiding pour on treatments (which have a greater risk of resistance developing) should be considered