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Quadraspidiotus lenticularisLindinger

A scale insect pest of trees that is new to the Western Hemisphere


Name: Quadraspidiotus lenticularis Lindinger
Taxonomic Position:
Animalia: Arthropoda: Insecta: Homoptera: Diaspididae
Common Names: round olive scale; Lindinger's lenticular scale

This armored (or hard) scale insect was detected on olive during a predeparture inspection (destination Florida, U.S.A.) in Santiago, Chile in early 1999. This is the first report of this species in the new world.

Issues of Concern: The potential host range (see below) of this scale poses a risk to North American forest, ornamental, and nursery trees.

Hosts: birch (Betula sp.); beech (Fagus sp.); ash (Fraxinus sp.); olive (Olea europaea); pistachio (Pistacia vera); poplar (Populus); oak (Quercus sp.)

Europe (Crimea, Italy, Greece, France, Hungary, Spain, Denmark); Russia; Turkey; Africa (Morocco); South America (now in Chile); Australia

Detection Strategies
Armored scales are likley to be found on any part of a plant, including leaves, stems, fruits, nuts, and roots. According to Wallace (1976), their presence on bark or stems may be difficult to detect. Presence may be indicated by chlorotic areas on foliage and stems, dark brown to black blotches on foliage and stems, spots on fruit, defoliation and stem dieback. Flat or slightly raised areas on the bark may denote an armored scale infestation. Scraping of bark with a thumbnail (or knife blade) will cause armor to dislodge, leaving white spots and possibly remnants of the ventral protective covering. The use of a hand lens in inspection is recommended, and contrast for viewing may be increased by wetting the bark with water prior to observation..

Wallace, G. W. (1976) Arthropods of Florida and Neighboring Land Areas, Volume 3: Florida Armored Scale Insects. Florida Department of Agriculture and Consumer Services, Gainesville, FL.

Warning: The information in this archived item was not confirmed with the appropriate National Plant Protection Organization and is provided solely for informational purposes. Please use this information with caution.

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