University of Kentucky College of Agriculture

Yukie KajitaYukie Kajita

NSF SEES Fellow and Research Scientist II | Obrycki Laboratory

 

Department of Entomology
S-225 Agricultural Science Center N
University of Kentucky
Lexington, KY 40546-0091
Ph: 859.257.7450
Fax: 859.323.1120
Email: yukie.kajita@uky.edu

Research Interests

My research interests include Invasion Ecology, Insect Physiology, and Chemical Ecology to understand the interspecific interactions among arthropod predators in agroecosystems, the mechanisms of successful introduction of biological control agents, and the effects of invasive species on the native communities.

 

Lady Beetle
Lady beetles Harmonia axyridis, Coccinella transversoguttata, and Coccinella novempunctata.
(S. Stamper, 2009)

 

Education

    Ph.D. Biology and Ecology, Utah State University, Logan, August 2008

  • Advisor: Dr. Edward (Ted) W. Evans
    Dissertation: Reproductive tactics of aphidophagous lady beetles: Comparison of a native species and an invasive species that it displacing it.
  • M.S. Agriculture and Entomology, Yamagata University, Tsuruoka, March 2002

  • Advisor: Dr. Hironori Yasuda
    Thesis: Effects of two predatory ladybirds (Coleoptera: Coccinellidae) on the guild structure of aphidophagous arthropods.
  • B.S. Agriculture and Entomology, Yamagata University, Tsuruoka, March 2000

  • Advisor: Dr. Hironori Yasuda
    Thesis: Effects of indigenous ladybird species (Coleoptera: Coccinellidae) on the survival of an exotic species.

 

Research Experience

Post-doctoral scholar
  • University of Kentucky, Department of Entomology, Lexington, Kentucky
    August 2008–Present
Research Assistant
  • Utah State University, Department of Biology, Logan, Utah
    May–August 2004–2008
    Worked with Dr. Evans on the research of biological control of invasive Canadian thistles in Utah, and the biological control of cereal leaf beetles.
    Visiting Scientist: US-Japan Cooperative Science Program (NSF INT-0089374)
  • Utah State University, Department of Biology, Logan, Utah
    August–September 2001
    Collaborated with Dr. Evans (Utah State University) and Dr. Yasuda (Yamagata University, Japan) on the research of the interactions between native and invasive predatory lady beetles in the United States.

 

Teaching Experience

    Teaching Assistant

  • Utah State University, Department of Biology, Logan, Utah
    September–April 2003–2008
    Worked in the general Biology Lab (Biol 1210/1220, Biol 1610/1620). Prep work for lab setting, writing lecture, and making exams.
    Worked in the Field Ecology class (Biol 3220). Assistant for data collecting in fields and data analyses.
  • Teaching Assistant

  • Yamagata University, Tsuruoka, Yamagata, Japan
    April 2000–March 2002
    Assisted Professor Hironori Yasuda in conducting two laboratory classes per semester (Insect Ecology and Applied Entomology), including lab preparation, equipment training, and demonstrations.

 

Academic Awards

    Ecology Center Graduate Research Support Awards, Utah State University, $2,500, 2005–2006, and $2,200, 2006–2007

  • The research awards for MS and PhD graduate students pursuing ecology degrees to support thesis / dissertation research. The grants are competitive and selection is based on scientific merit, quality of the proposals, and relevance to the field of ecology.
  • James A. and Patty MacMahon Scholarship 2006, Utah State University ($1,000) 2006–2007

  • The scholarship is for the graduate students in Biology who are seeking Ecology degree in Utah State University. Selected based on the students statements and academic excellence.
  • IOBC Fellowship (International Organization of Biological Control) Student Travel Grants (800 euros) 2007

  • The fellowship for the meeting of the Ecology of Aphidophaga 10, Athens, Greece, September 6–10 2007. Selected based on the research abstract.

 

Publications

  • Kajita Y, Obrycki JJ, Sloggett JJ, Haynes KF accepted by Oecologia
    Intraspecific alkaloid variation in ladybird eggs and its effects on con- and heterospecific intraguild predators.

  • Kajita Y, Evans EW (2009)
    Alfalfa fields promote high reproductive rate of an invasive predatory lady beetle.
    Biol Invasions: DOI 10.1007/s10530-009-9644-8

  • Kajita Y, Evans EW (2009)
    Ovarian dynamics and oosorption in two species of predatory lady beetles (Coleoptera: Coccinellidae). Physiol Entomol 34: 185194

  • Kajita Y, Evans EW (2009)
    Reproductive responses of invasive and native predatory lady beetles (Coleoptera:
    Coccinellidae) to varying prey availability. Environ Entomol 38: 12831292

  • Kajita Y, Takano F, Yasuda H, Evans EW (2006)
    Effects of native ladybirds on oviposition of the exotic species, Adalia bipunctata (Coleoptera: Coccinellidae) in Japan. Appl Entomol Zool 41:5761

  • Kajita Y, Takano F, Yasuda H, Evans EW (2006)
    Interactions between introduced and native predatory ladybirds (Coleoptera: Coccinellidae): factors influencing the success of species introductions. Ecol Entomol 31:5867

  • Kindlmann P, Yasuda H, Kajita Y, Dixon AFG (2005)
    Field test of the effectiveness of ladybirds in controlling aphids. In: Hoddle MS (ed) International symposium on biological control of arthropods, September 12-16, 2005, Davos, Switzerland, USDA Forest Service, pp 441447 

  • Yasuda H, Evans EW, Kajita Y, Urakawa K, Takizawa T (2004)
    Asymmetric larval interactions between introduced and indigenous ladybirds in North America. Oecologia 141:722731

  • Agarwala BK, Yasuda H, Kajita Y (2003)
    Effect of conspecific and heterospecific faeces on foraging and oviposition of two predatory ladybirds: role of faecal cues in predator avoidance. J Chemical
    Ecol 292: 357376

  • Kajita Y, Takano F, Yasuda H (2000)
    Effects of indigenous ladybird species (Coleoptera: Coccinellidae) on the survival of
    exotic species in relation to prey abundance. Appl Entomol Zool 35:473479

  • Book chapter:
    Yasuda H, Kajita Y, Takizawa T (2009)
    Predator-prey interactions. In: Yasuda H, Kidokoro T, Tanaka K (eds). Interspecific interactions and pest managements (in Japanese). pp. 19–43, Kyoto Univ. Press, Kyoto.

 

Presentations

    “Effects of indigenous ladybird species (Coleoptera: Coccinellidae) on the survival of an exotic species” (Bachelor Thesis)
  • Oral presentation at the 7th International Symposium of Ecology of Aphidophaga, August 31September 4 in 1999, Quebec, Canada.
  • Oral presentation at the 44th Annual Meeting of the Japanese Society of Applied Entomology and Zoology, March 2931 in 2000, Ibaraki, Japan.
  • Oral Presentation at the 88th Pacific Branch of the Entomological Society of America, June 2023 in 2004, Bozeman, Montana, U.S.A.

“Effects of two predatory ladybirds (Coleoptera: Coccinellidae) on the aphidophagous arthropods” (Master Thesis)

  • Oral presentation at the 45th Annual Meeting of the Japanese Society of Applied Entomology and Zoology, March 31April 2 in 2001, Shimane, Japan.
  • Oral presentation at the 49th Annual Meeting of the Ecological Society of Japan, March 2530 in 2002, Sendai, Japan.
  • Oral presentation at the 46th Annual Meeting of the Japanese Society of Applied Entomology and Zoology, March 2830 in 2002, Tokyo, Japan.
  • Poster presented at 8th International Symposium of Ecology of Aphidophaga, September 16 in 2002, Ponta Delgada Azores, Portugal.
  • Oral Presentation at the 52nd Annual meeting of the Entomological Society of America, September 1417 in 2004, Salt Lake City, UT, USA.
  • Oral Presentation at the 1st International Symposium of Biological Control of Aphids and Coccids, September 2529 in 2005, Tsuruoka, Yamagata, Japan.

“Reproductive tactics of aphidophagous ladybirds of the genus Coccinella: Comparison of a native species and a competing invasive species ” (Ph.D. Dissertaion)

  • Oral Presentation at the 54th Annual meeting of the Entomological Society of America, December 1013 in 2006, Indianapolis, Indiana, USA. (Travel expenses were supported by James A. and Patty MacMahon Scholarship in 2006, Utah State University).
  • Oral Presentation at the Ecology of Aphidophaga 10, September 610 in 2007, Athens, Greece. Travel expenses were supported by IOBC fellowship and the Ecology Center, Utah State University.
  • Oral Presentation at the 55th Annual meeting of the Entomological Society of America, December 912 in 2007, San Diego, California, USA.

 

Professional Memberships

  • Entomological Society of America, since 2004
  • Ecological Society of Japan, 2001–2004
  • Japanese Society of Applied Entomology and Zoology, 1999–2004

 

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