[APWG] Recent publication: Spent Coffee Grounds Do Not Control Cycad Aulacaspis Scale

Wed Apr 24 09:39:08 CDT 2013

*On the medicinal plant side of things, we have often "joked" of having a
Journal of What Didn't Work - because it's hard to know what people have
already that didn't work, since that rarely gets published. So kudos to
Montgomery Botanical Center for finding an outlet for this information!*

The April 2013 issue of
HortTechnology<http://horttech.ashspublications.org/content/23/2.cover-expansion>features
new research by Tracy Magellan, Chad Husby, Stella Cuestas, and M.
Patrick Griffith which found that spent coffee grounds do not control Cycad
Aulacaspis Scale (Asian Cycad Scale, CAS). Spent coffee grounds have been
reputed to treat cycad aulacaspis scale, but in this controlled study they
showed no effect. This scale insect, *Aulacaspis
yasumatsui<http://www.freshfromflorida.com/pi/pest-alerts/aulacaspis-yasumatsui.html/>
*, is a very destructive pest of cycads. CAS has not only been responsible
for killing many of the ornamental *Cycas* plantings in South Florida, but
also threatens Guam’s native cycad species with extinction. Controlling CAS
is therefore a high priority for conservation horticulture.

For more information, see the article by Magellan et al. on page
201<http://horttech.ashspublications.org/lookup/volpage/23/201?iss=2>:
http://horttech.ashspublications.org/content/23/2/201
For more news from the Montgomery Botanical Center, see:
http://www.montgomerybotanical.org/Pages/Current.htm

Patricia S. De Angelis, Ph.D.
Botanist, Division of Scientific Authority-US Fish & Wildlife
Service-International Affairs
Chair, Medicinal Plant Working Group-Plant Conservation Alliance
4401 N. Fairfax Dr., Suite 110
Arlington, VA  22203
703-358-1708 x1753
FAX: 703-358-2276

Promoting sustainable use and conservation of our native medicinal plants.
<www.nps.gov/plants/medicinal>

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