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United States Department of Agriculture

Agricultural Research Service

Wai Gee
Foodborne Toxin Detection and Prevention
Biological Science Technician
wai.gee@ars.usda.gov
Phone: (510) 559-6459
Fax: (510) 559-5777
USDA, ARS, PWA, WRRC-FTDP
800 BUCHANAN STREET
ALBANY, CA, 94710


Publications (Clicking on the reprint icon Reprint Icon will take you to the publication reprint.)
In-field volatile collection and analysis method utilizing a portable GC-MS: in situ headspace analysis of intact and damaged yellow starthistle flower heads Reprint Icon - (Peer Reviewed Journal)
Beck, J.J., Porter, N., Cook, D., Griffith, C., Gee, W.S., Rands, A.D., Truong, T.V., Smith, L., San Roman, I. 2015. In-field volatile collection and analysis method utilizing a portable GC-MS: in situ headspace analysis of intact and damaged yellow starthistle flower heads. Phytochemical Analysis. 26:395-403.
Comparison of ex-situ volatile emissions from intact and mechanically damaged walnuts Reprint Icon - (Peer Reviewed Journal)
San Roman, I., Bartolome, L., Gee, W.S., Beck, J.J., Alonso, R.M. 2015. Comparison of ex-situ volatile emissions from intact and mechanically damaged walnuts. Food Research International. 72:198-207.
Electrophysiological responses of male and female Amyelois transitella antennae to pistachio and almond host plant volatiles - (Peer Reviewed Journal)
Beck, J.J., Light, D.M., Gee, W.S. 2014. Electrophysiological responses of male and female Amyelois transitella antennae to pistachio and almond host plant volatiles. Entomologia Experimentalis et Applicata. 153(3):217-230. doi: 10.111/EEA.12243.
Semiochemicals to monitor insect pests – future opportunities for an effective host plant volatile blend to attract navel orangeworm in pistachio orchards - (Book / Chapter)
Beck, J.J., Mahoney, N.E., Gee, W.S., Higbee, B.S., Baig, N., Griffith, C.M. 2014. Semiochemicals to monitor insect pests – future opportunities for an effective host plant volatile blend to attract navel orangeworm in pistachio orchards. American Chemical Society. p. 191-210. doi: 10.1021/BK-2014-1172.CH014.
Comparison of the volatile emission profiles of ground almond and pistachio mummies: part 1 – addressing a gap in knowledge of current attractants of navel orangeworm - (Peer Reviewed Journal)
Beck, J.J., Mahoney, N.E., Cook, D., Gee, W.S., Baig, N. 2014. Comparison of the volatile emission profiles of ground almond and pistachio mummies: part 1 – addressing a gap in knowledge of current attractants of navel orangeworm. Phytochemistry Letters. 9:102-106. DOI.10.1016/j.phytol.2014.04.010.
The major volatile compound 2-phenylethanol from the biocontrol yeast Pichia anomala inhibits growth and expression of aflatoxin biosynthetic genes of Aspergillus flavus Reprint Icon - (Peer Reviewed Journal)
Hua, S.T., Beck, J.J., Sarreal, S.L., Gee, W.S. 2014. The major volatile compound 2-phenylethanol from the biocontrol yeast Pichia anomala inhibits growth and expression of aflatoxin biosynthetic genes of Aspergillus flavus. Mycotoxin Research. 30(2):71-78. doi: 10.1007/s12550-014-0189-Z.
Comparison of the volatile emission profiles of ground almond and pistachio mummies: part 2 - critical changes in emission profiles as a result of increasing the water activity - (Peer Reviewed Journal)
Beck, J.J., Mahoney, N.E., Cook, D., Higbee, B.S., Light, D.M., Gee, W.S., Baig, N. 2014. Comparison of the volatile emission profiles of ground almond and pistachio mummies: part 2 - critical changes in emission profiles as a result of increasing the water activity. Phytochemistry Letters. 8:220-225. DOI: org/10.1016/j.phytol.2014.01.004.
Ex situ volatile survey of ground almond and pistachio hulls for emission of spiroketals: Analysis of hull fatty acid composition, water content, and water activity - (Peer Reviewed Journal)
Mahoney, N.E., Gee, W.S., Higbee, B.S., Beck, J.J. 2013. Ex situ volatile survey of ground almond and pistachio hulls for emission of spiroketals: Analysis of hull fatty acid composition, water content, and water activity. Phytochemistry Letters. 7:225-230.
Headspace volatiles from 52 oak species advertise induction, species identity, and evolution, but not defense Reprint Icon - (Peer Reviewed Journal)
Pearse, I.S., Gee, W.S., Beck, J.J. 2012. Headspace volatiles from 52 oak species advertise induction, species identity, and evolution, but not defense. Journal of Chemical Ecology. 39(1):90-100.
Generation of the volatile spiroketals conophthorin and chalcogran by fungal spores on polyunsaturated fatty acids common to almonds and pistachios Reprint Icon - (Peer Reviewed Journal)
Beck, J.J., Mahoney, N.E., Gee, W.S., Cook, D. 2012. Generation of the volatile spiroketals conophthorin and chalcogran by fungal spores on polyunsaturated fatty acids common to almonds and pistachios. Journal of Agricultural and Food Chemistry. 60(48):11869-11876.
Hull split and damaged almond volatiles attract male and female navel orangeworm moths Reprint Icon - (Peer Reviewed Journal)
Beck, J.J., Higbee, B.S., Gee, W.S., Merrill, G.B., Hayashi, J.M., Light, D.M. 2012. Hull split and damaged almond volatiles attract male and female navel orangeworm moths. Journal of Agricultural and Food Chemistry. 60(33):8090-8096.
Electroantennographic bioassay as a screening tool for host plant volatiles Reprint Icon - (Peer Reviewed Journal)
Gee, W.S., Light, D.M., Beck, J.J. 2012. Electroantennogram bioassay as a screening tool for host plant volatiles. Journal of Visualized Experiments. 63:e3931.
Volatiles emissions from the flea beetle Altica litigata (Coleoptera: Chrysomelidae) associated with invasive Ludwigia hexapetala Reprint Icon - (Peer Reviewed Journal)
Carruthers, R.I., Franc, M.K., Gee, W.S., Cosse, A.A., Grewell, B.J., Beck, J.J. 2011. Volatiles emissions from the flea beetle Altica litigata (Coleoptera: Chrysomelidae) associated with invasive Ludwigia hexapetala. Chemoecology. 21(4):253-259.
Volatile analysis of ground almonds contaminated with naturally occurring fungi Reprint Icon - (Peer Reviewed Journal)
Beck, J.J., Mahoney, N.E., Cook, D., Gee, W.S. 2011. Volatile analysis of ground almonds contaminated with naturally occurring fungi. Journal of Agricultural and Food Chemistry. 59(11):6180-6187.
Ambient orchard volatiles from California almonds - (Peer Reviewed Journal)
Beck, J.J., Higbee, B.S., Gee, W.S., Dragull, K.D. 2011. Ambient orchard volatiles from California almonds. Phytochemistry Letters. 4(2):199-202.
Non-pheromonal control of navel orangeworm as a promising method toward decreasing contamination of Aspergillus flavus in California tree nuts - (Abstract Only)
Beck, J.J., Light, D.M., Higbee, B.S., Dragull, K.D., Merrill, G.B., Gee, W.S. 2010. Non-pheromonal control of navel orangeworm as a promising method toward decreasing contamination of Aspergillus flavus in California tree nuts. American Chemical Society Abstracts.
Developing ambient almond orchard volatile mixtures for navel orangeworm (NOW) monitoring - (Abstract Only)
Beck, J.J., Higbee, B.S., Light, D.M., Dragull, K.D., Merrill, G.B., Gee, W.S. 2009. Developing ambient almond orchard volatile mixtures for navel orangeworm (NOW) monitoring. Almond Board of California.
Ambient almond volatiles from geographically different orchards and their relationship to navel orangeworm - (Proceedings) - (14-Mar-09)
In situ volatiles from a single cultivar of Prunus dulcis and their relationship to navel orangeworm - (Proceedings) - (14-Mar-09)
In Situ Seasonal Study of the Volatile Production of Almonds (Prunus dulcis), var. 'Nonpareil' and Relationship to Navel Orangeworm - (Peer Reviewed Journal)
Beck, J.J., Merrill, G.B., Higbee, B.S., Light, D.M., Gee, W.S. 2009. In Situ Seasonal Study of the Volatile Production of Almonds (Prunus dulcis), var. 'Nonpareil' and Relationship to Navel Orangeworm. Journal of Agricultural and Food Chemistry. 57(9):3749-3753.
An in situ, seasonal study of volatiles from a single cultivar of Prunus dulcis, and their relationship to navel orangeworm moth - (Abstract Only)
Beck, J.J., Merrill, G.B., Gee, W.S., Higbee, B.S., Light, D.M. 2009. An in situ, seasonal study of volatiles from a single cultivar of Prunus dulcis, and their relationship to navel orangeworm moth. American Chemical Society National Meeting.
Developing Ambient Almond Orchard Volatile Mixtures for NOW Bioassay Analyses - (Abstract Only)
Beck, J.J., Merrill, G.B., Higbee, B.S., Light, D.M., Gee, W.S. 2008. Developing Ambient Almond Orchard Volatile Mixtures for NOW Bioassay Analyses. Almond Board of California.
Volatile Emission of Mechanically Damaged Almonds: An Old and New Method of Investigation to Determine Potential NOW Attractants - (Abstract Only)
Beck, J.J., Merrill, G.B., Higbee, B.S., Gee, W.S., Light, D.M., Roitman, J.N., Bettiga, J. 2007. Volatile Emission of Mechanically Damaged Almonds: An Old and New Method of Investigation to Determine Potential NOW Attractants. Multicrop Aflatoxin and Fumonisin Elimination and Fungal Genomics Workshop-The Peanut Foundation.
ARS News Articles
Last Modified: 7/26/2016
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