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United States Department of Agriculture

Agricultural Research Service

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Research Project: Monitoring Biotypic Diversity of Russian Wheat Aphid

Location: Wheat, Peanut and Other Field Crops Research

2013 Annual Report


1a.Objectives (from AD-416):
Collaborative project investigating the biotypic diversity in Russian wheat aphid in the western United States.


1b.Approach (from AD-416):
Russian wheat aphid (RWA) samples (n=20-30/state) will be collected from 8 western states (OK, TX, CO, NM, KS, WY, ID, UT) in 2011. Colonies will be maintained at Stillwater and screened against key sources of resistance in wheat and barley in order to determine their biotype classification. Plants to be screened will include Dn7 resistance that is currently being transferred to wheat for resistance against the new RWA biotype, RWA2. Three to four sites will be selected to study RWA biotype diversity within fields in 2013. These aphid samples will be screened against resistance sources in 2014 in order to determine their biotypic status.


3.Progress Report:

Russian wheat aphid (RWA) samples (n=20-100/state) were collected from 7 western states (OK, TX, CO, NM, KS, WY, and UT) in 2013. Colonies were maintained at Stillwater and screened against key sources of resistance in wheat and barley in order to determine their biotype classification. Plants to be screened will include all 12 sources of resistance to RWA in wheat and barley. The resistance sources include the gene, Dn7, which is currently being transferred to wheat for resistance against the new RWA biotype, RWA2. In 2012 and 2014, RWA samples (n=30-100/site) will focus on 5 - 8 sites to determine within field biotype composition. Results over the 4 year period will determine biotypic diversity in RWA both at a regional and localized area in the western United States. The cooperator also provided funds to extend a technician position and compiled the results from insect pest research by other researchers and incorporated on these results into the mobile phone application, IWHEAT, database for use by extension agents and growers.


Last Modified: 8/21/2014
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