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NEW INVASIVE PEST OF CYCADS
Poliaspis cycad scale (PCS) – Poliaspis cycadis
Comstock
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First recorded in Florida from specimens collected on 2 May 2007 from a
plant identified as Dioon sp. in Homestead, Miami-Dade County by
Holly Glenn (University of Florida-IFAS Tropical Research & Education
Center).
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Initial identification at the Division of Plant Industry’s Florida State
Collection of Arthropods was confirmed by the Systematic Entomology
Laboratory in Beltsville, Maryland.
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Originally recorded in the U.S. by Comstock in 1883 from Dioon edule
Lindl., Cycas revoluta Thunb., and the crucifer Microsemia sp.
(= Streptanthus) in the Department of Agriculture conservatory in
Washington D.C.
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Reported again by Comstock from the same locality on Dioon edule in
1898.
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Not
reported again until 1993, when it was discovered on cycads in a private
collection in Orange County, California.
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Reported in Orange County, California, by the California Department of Food
and Agriculture Plant Pest Diagnostics Branch in their 2005 California
Plant Pest & Diagnostics Report (Vol. 22, No. 1, covering the period
July 2002 through July 2005).
http://www.cdfa.ca.gov/phpps/ppd/CPPDR/CPPDR_2005_22-1.pdf
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Reported in San Diego County, California, by the California Department of
Food and Agriculture Plant Pest Diagnostics Branch in their 2007
California Plant Pest & Diagnostics Report (Vol. 23, No. 1, covering the
period July 2005 through December 2006).
http://www.cdfa.ca.gov/phpps/ppd/CPPDR/CPPDR_2006_23-1.pdf
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This scale is very similar in appearance to both the false oleander scale (Pseudaulacaspis
cockerelli Cooley) and the cycad aulacaspis scale (Aulacaspis
yasumatsui Takagi).
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Nothing is known about its biology or invasive tendencies.
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Likely native to the “Asian region,” but reported from the U.S., India, and
the U.K.
Pest Alert posted by the Florida Department of Plant Industry
on 1 June 2007
http://www.doacs.state.fl.us/pi/enpp/ento/poliapsis_cycadis.html
Notification of the discovery of PCS in Florida has spread. The following are
additional pest alerts posted on the internet:
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