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Western Washington
Pheromone-trap Delimiting Survey and Field observations for European
Poplar Shoot Borer,
Gypsonoma aceriana (Duponchel) (Lepidoptera: Torticidae),
an Old World Poplar Pest new to North America. |
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Eric H. LaGasa1,
Patrik Hertzog2, Dan Barshis2, Kelley Turner2
and Hannah Smith2
2001 Entomology Project Report - WSDA PUB 034 (N/1/00) 2001 |
Background |
 In
1998 and 1999, three male adults of European poplar shoot borer
(EPSB), Gypsonoma aceriana (Duponchel), were collected, as non-target
captures in various exotic pest surveys, in western Washington
State. The first EPSB was found in the Seattle port area, in
a mercury vapor light trap. Another specimen emerged inside
a cage placed over leaf litter beneath hybrid poplars at the
Washington State University Research Station near Puyallup,
in Pierce Co. (T. Murray, collector). A third was found at a
tree nursery near Roy, also in Pierce Co., in a trap baited
with European pine shoot moth, Rhyacionia buoliana [D. &
S.], lure. (Figure 1.)
EPSB is a notable pest of many poplar species, Populus spp.
(Salacaceae), as well as hybrids in plantations and nurseries
in Europe, where infestation of up to 93.7% of growing tips
has been recently reported (Georgiev and Velcheva 1999). Young
larvae mine leaves and older larvae bore into terminal shoots,
often causing gall-like swellings (Bradley et al. 1979).
In exterior appearance, adults of G. aceriana (Kuznetsov 1987)
(Figure 2.) are very similar to those of the North American
cottonwood twig borer, G. haimbachiana (Kearfott) (Miller 1987)
Genital anatomy provides the most reliable means of distinguishing
the two species. For a more thorough review of EPSB pest status,
biology, diagnostic characters, and the associated technical
literature, please see Miller and LaGasa, 2001. |
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2001 Project Objectives |
1. Determine
survey methods and survey area priorities.
• Research / acquire suitable pheromone attractant, dispensers,
and trap type to conduct adult delimiting survey.
• Plan a prioritized trap coverage of contiguous areas
of poplar hosts in western Washington.
2. Conduct a preliminary delimiting survey of EPSB distribution
in western Washington.
• Conduct survey to delimit EPSB in as large an area as
resources allow, beginning at known positive sites.
3. Observe and record biology and impacts of EPSB in Western
Washington.
• Examine host trees at sites of higher
EPSB pheromone-trap captures for evidence of infestation.
• Capture digital graphics of EPSB life stages, biology,
and feeding damage where possible.
1Chief
Entomologist - Washington State Department of Agriculture, Olympia,
Washington 98504-2560
2Entomology Aides (Project) - Washington State Department
of Agriculture, Olympia, Washington 98504-2560
Inquiries
regarding availability of this publication in alternative formats
should be directed to the WSDA Receptionist at (360) 902-1976
or Telecommunications Device for the Deaf (360) 902-1996. |
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