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1

Vouchers for treehoppers (Hemiptera: Membracidae) collected in Benton, Josephine, 
and Yamhill Counties, Oregon

Daniel T. Dalton1, Richard J. Hilton2, Dennis D. Kopp3, and Vaughn M. Walton1

1 Department of Horticulture, Oregon State University
2Southern Oregon Research and Extension Center, Oregon State University, Central Point, OR 
3Volunteer Curator, Smithsonian National Museum of Natural History, Washington D.C.

Cite this work as: 

Dalton, D. T.,  R. J. Hilton, D. D. Kopp, and V. M. Walton. 2020. Vouchers for treehoppers (Hemiptera: Membracidae) collected in 
Benton, Josephine, and Yamhill Counties, Oregon. Catalog: Oregon State Arthropod Collection. 4(1) p. 1—7.   
DOI: http://dx.doi.org/10.5399/osu/cat_osac.4.1.4650.

Abstract
Treehopper insect populations (Hemiptera: Membracidae) were surveyed in 2018 in Benton, 
Josephine, and Yamhill Counties, Oregon to determine their potential roles in the epidemiology of 
Grapevine red blotch virus. Stictocephala basalis and Tortistilus albidosparsus were identified through a 
taxonomic assessment of samples collected by hand near vineyards and in a natural area. Historical 
presence of Spissistilus festinus in the Willamette Valley is discussed. Voucher specimens were 
deposited in the Oregon State Arthropod Collection and at the United States National Museum of 
Natural History.

Introduction

Investigations into potential insect vectors of Grapevine red blotch virus (GRBV) began at Oregon 
State University in 2016 as a result of scientific breakthroughs in the identification and spatial 
dynamics of the virus (Al Rwahnih et al. 2013, Dalton et al. 2019). Viruses that are vectored by insects 
are typically transmitted by a narrow taxonomic group (Whitfield et al. 2015). The insect species 
Spissistilus festinus (Say) (Hemiptera: Membracidae: Smiliinae: Ceresini) was determined to be a 
competent vector of GRBV under greenhouse conditions (Bahder et al. 2016). 

Museum specimens/records

Historical records showed the presence of Sp. festinus in viticultural regions of northwest Oregon, but 
the most recent finding documented in the Oregon State Arthropod Collection (OSAC) occurred in 
1980, and specimens of Sp. festinus from southwest Oregon were also decades old (Table 1).

Field Surveys

Insect trapping surveys were conducted in regions of the Willamette Valley and the Illinois Valley, 
Oregon, in 2018. The goal was to determine whether populations of potential insect vectors of GRBV 
are currently present in areas of commercial wine grape production. Treehoppers were collected in 
four Willamette Valley sites and one site near Cave Junction, Oregon. Representative specimens were 
sent to Dr. Dennis Kopp, Volunteer Curator of Hemiptera at the Smithsonian National Museum of 



Catalog: Oregon State Arthropod Collection   Vol 4(1) 

2

Specimen# Locality County Date Collector Latitude Longitude
0000001540 Unity Baker 10-Jun-1955 Joe Schuh 44.438° N 118.192° W
0000001541 Corvallis Benton 25-Apr-1937 C. G. Thompson 44.570° N 123.275° W
0000001542 Corvallis Benton 25-May-1937 C. G. Thompson 44.570° N 123.275° W
0000001543 Corvallis Benton 02-07 May-1937 C. G. Thompson 44.570° N 123.275° W
0000001544 Corvallis Benton 10-May-1930 Itol Wilcox 44.570° N 123.275° W
0000001545 Valley of the 

Rogue Park
Douglas 20-May-1972 Musgrave 42.409° N 123.134° W

0000001546 Applegate Jackson 11-May-1969 Paul Oman 42.257° N 123.169° W
0000001547 Griffin Creek Jackson 3-May-1956 Schuh & Vertrees 42.278° N 122.936° W
0000001548 Sams Valley Jackson 1-May-1970 Oman 42.492° N 122.975° W

0000001549 Warm Springs Jefferson 25-Apr-1977 Oman 44.792° N 121.326° W
0000001550 Grants Pass Josephine 8-Aug-1941 S. C. Jones 42.439° N 123.328° W
0000001551 Dodson Multnomah 27-Jul-1923 45.605° N 122.038° W
0000001552 Forest Grove Washington 19-May-1938 S. E. Crumb Jr. 45.519° N 123.130° W
0000001553 Forest Grove Washington 7-Apr-1938 S. E. Crumb Jr. 45.519° N 123.130° W
0000001554 Forest Grove Washington 6-Aug-1918 J. M. Langston 45.519° N 123.130° W
0000001555 McMinnville Yamhill 15-Apr-1980 K. Fender 45.204° N 123.183° W

0000001556 McMinnville Yamhill 1935 K.M. & D. M. Fender 45.204° N 123.183° W

Table 1. Historical specimens of Spissistilus festinus in the Oregon State Arthropod Collection.  

Natural History (USNM), Washington D. C., USA, who identified them to species based on external 
morphology and characters on the male genitalia. In the Willamette Valley, individuals of Stictocephala 
basalis (Walker) (Figure 1) were collected by hand as late-instar nymphs in a natural area near 
Corvallis, Benton County, and reared to the adult stage for species identification. In Yamhill County, 
specimens of St. basalis were collected as nymphs and adults in three commercial vineyards using 
hand and vacuum sampling techniques. Examples of Tortistilus albidosparsus (Stål) (Figure 2)  were 
collected as nymphs and adults at one of the Yamhill County vineyards. In Josephine County, adult 
examples of T. albidosparsus were found and were the only species collected. No populations of Sp. 
festinus were discovered at these sites in 2018.

This paper serves to document the deposition of exemplar specimens for these species in a public 
research collection. Specimens were assigned unique identifiers that were then printed as human-
readable and 2D matrix codes on acid free labels affixed to the specimens.  In total 34 specimens 
were deposited in the OSAC on 3 December 2019 (Accession OSAC_AC-2019-12-18-01-001) and 8 
specimens were deposited at the USNM (Table 2).

Acknowledgements:
 
Supported by:  
California Department of Food and Agriculture (agreement#: 2017-0418-000-SA) and Oregon Wine Board. 
Contents of this publication do not necessarily represent the official views of funding sources.



Catalog: Oregon State Arthropod Collection   Vol 4(1) 

3

a

b

Figure 1. Oregon State Arthropod Collection (OSAC) voucher specimens of Stictocephala basalis. a. 
female, OSAC_0001229084; b. male, OSAC_0001229119, abdomen removed. Scale bar= 1 mm.



Catalog: Oregon State Arthropod Collection   

4

a

b

Figure 2. Oregon State Arthropod Collection (OSAC) voucher specimens of Tortistilus albidosparsus. a.  
female, OSAC_0001229096; b.  male, OSAC_0001229095, abdomen removed.  Scalebar  =1 mm. 

Vol 4(1) 



Catalog: Oregon State Arthropod Collection   

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Vol 4(1) 



Catalog: Oregon State Arthropod Collection   

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Vol 4(1)

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Catalog: Oregon State Arthropod Collection   

7

Vol 4(1) 

References:

Al Rwahnih M., A. Dave, M. M. Anderson, A. Rowhani, J. K. Uyemoto, and M. R. Sudarshana. 2013. 
Association of a DNA virus with grapevines affected by red blotch disease in California. 
Phytopathology 103(10): 1069—1076.  
https://doi.org/10.1094/PHYTO-10-12-0253-R.

Bahder B. W., F. G. Zalom, M. Jayanth, and M. R. Sudarshana. 2016. Phylogeny of geminivirus coat 
protein sequences and digital PCR aid in identifying Spissistilus festinus as a vector of 
Grapevine red blotch-associated virus. Phytopathology 106(10):1223-1230.  
https://doi.org/10.1094/PHYTO-03-16-0125-FI.

Dalton D. T., R. J. Hilton, C. Kaiser, K. M. Daane, M. R. Sudarshana, J. Vo, F. G. Zalom, J. Z. Buser, 
and V. M. Walton. 2019. Spatial associations of vines infected with Grapevine red blotch 
virus in Oregon vineyards. Plant Disease 103(7):1507-1514.  
https://doi.org/10.1094/PDIS-08-18-1306-RE.

Whitfield A. E., B. W. Falk, and D. Rotenberg. 2015. Insect vector-mediated transmission of plant 
viruses. Virology 479/480: 278—289. https://doi.org/10.1016/j.virol.2015.03.026.




