University of Florida

Spider Mites

Tetranychidae

  • Adult: minute, whitish, greenish or reddish, often with a pair of spots on body, eight-legged, up to 1/50 in. long.
  • Egg: spherical, shiny, straw-colored, attached to the underside of leaves, usually to the web which the adults spin.
  • Small Nymph: yellowish or pale in color, six-legged.
  • Large Nymph: like adults but slightly smaller.
  • Larva: elongate, tapering posteriorly, generally dark with bright markings, and may be covered with spines.
  • Generation Time: 5-19 days.
  • Damage: lightly infested leaves have light-colored stippling, while heavily infested leaves often have reddish-brown necrotic blotches.

Spider Mite Pictures

Spider mites
Image #23.
Spider mites-


a) may become abundant covering plant parts, especially lower leaf surfaces, with silk;

b)
adult and egg of a common spider mite species. All lifestages occur primarily on lower leaf surfaces.

Spider mite damage
Image #24.
Spider mites-

nymphs and adults cause stippling of upper surfaces of leaves by feeding with piercing-sucking mouthparts on lower surfaces of leaves.