Editors: W.T. Wilsey, C.R. Weeden, and A.M. Shelton
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Twospotted
Spider Mite
(Tetranychus urticae) - Life Cycle
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Click for the image
of adult
by
UC -Davis
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Adults:
Spider mites are not an insect but an arachnid, like a spider having
eight legs. The adult is approximately 1/60 inch (0.4 mm) in size
and varies from pale green to greenish amber or yellow. The most
important spider mite is the two-spotted spider mite with its characteristic
two black spots (sometimes four) on each side of its back. |
Click for the image
of adult
by
Iowa State University
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Eggs:
The eggs are very minute, round, and vary in color from colorless
to an opaque yellow. The female will lay up to 200 eggs over a 2
week period usually on the under sides of leaves near the veins.
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Larvae:
Larvae of the spider mite are not much larger than the eggs. They
are translucent and only have six legs. |
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Nymphs:
The immature spider mite, the nymph, has eight legs. The nymphs
also vary in color ranging from pale green to yellow. They may also
develop dark spots on each side of its back, but the spots are more
prominent in the adult. |
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Damage inflicted by twospotted
spider mite
©All material is protected
by Section 107 of the 1976 copyright law.
Copyright is held by Cornell University.
Maintained by Jason D. Plate. Last updated Mar. 8th, 2007.
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