Raul Villanueva

Assistant Professor, Extension
Phone (270) 365-7541
Fax (270) 365-2667

Department of Entomology
1205 Hopkinsville Street P.O. Box 469
U.K. Research & Education Center Princeton KY 42445-0469


  • Ph.D. Entomology - University of Florida, USA.
  • M.Sc. Biology - Queen's University, Canada.

Extension Statement

As the entomologist in charge of field crops at the University of Kentucky, my extension programs focus principally on wheat, corn, and soybean crops for the entire state. However, as the only member of the Department of Entomology outside of the Lexington campus, I am active supporting my clientele with entomological concerns related to vegetables, fruit, ornamentals, and arthropods invading structures and of importance for human health in western Kentucky.

Aphid & Rice Stink Bug

Dectes stem borer adult & larva

Clockwise starting from top: infected aphid, rice stink bug in barley, slug damage in soybeans, Dectes stem borer larva, and adult.

Applied Research

My applied research is based in building teams among specialists from various disciplines and organizations. My research program also incorporates the mentoring of undergraduate and graduate students to conduct research on issues relevant to the farmers of Kentucky. Topics currently evaluated in my program are:

  • Aphid presence in the fall and spring, insecticide applications, and BYDV infections (funded by the Kentucky Small Grains Promotion Council)
  • Diversity, identification and damage caused by stink bugs in Kentucky soybeans and corn (MSc. Thesis: potential student Y. Gonzalez, funded by KY Soybean Promotion Board)
  • Slug damage and cover crops, insecticide seed treatments, and ground beetle relationships (not funded)
  • Management of Brown Marmorated Stink Bugs: Halymorpha halys in Kentucky (MSc. Thesis: L. Fann, funded by USDA-NIFA)
  • Biology, abundance, and damage caused by Dectes stem borer (MSc. Thesis, I. Gomes)
  • Distribution and phenology of Kudzu bug in Kentucky.
  • Ambrosia beetles: phenology and management (funded by KY Department of Agriculture)
  • Sugarcane aphid on grain, forage and sweet sorghum (not funded)

Current graduate students

Selected peer-reviewed publications

  • Zapata, S.D., R. Dudensing, D. Sekula.G. Esparza-Diaz, and R.T. Villanueva. 2017. Economic impact of the sugarcane aphid outbreak in south Texas. Journal of Agricultural and Applied Economics. 1-25. doi:10.1017/aae.2017.24
  • Armstrong, J. S., L. Mbulwe, D. Sekula-Ortiz G., R. T. Villanueva, and W. L. Rooney. 2016. Resistance to Melanaphis sacchari (Hemiptera: Aphididae) in forage and grain sorghums. Journal of Economic Entomology, 0:1-7.
  • Villanueva R.T., and G. Esparza-Diaz. 2016. Phytoseiids as potential natural enemies of the potato psyllid in organic potato production in south Texas. Journal of the Acarological Society of Japan, 25: 137-145.

ENT 770 Spring 2019: Travel Abroad Opportunity

AGRICULTURE ENTOMOLOGY STUDY ABROAD: PERU. This topical seminar is meant to expand the knowledge of graduate students on the agricultural production systems, IPM practices, insect biodiversity, and ecological diversity of contrasting regions (Semi-desertic irrigated areas, Andean plateau, and Amazonian rainforest) of a developing country as Peru. Download the Spring 2019 ENT-770 flyer (PDF) for detailed information.