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Astri Wayadande


Astri Wayadande

Assistant Director
Associate Professor
Vector-pathogen interactions, food safety, insect biotyping


  • B.S., University of California at Davis, Entomology
  • M.S., University of Missouri, Entomology
  • Ph.D., Ohio State University, Entomology
  • Postdoc, Oklahoma State University, Plant Pathology



After Dr. Wayadande received her Ph.D. under the direction of Dr. Lowell R. Nault, she joined Jacqueline Fletcher at Oklahoma State University for a post-doc and later as a non-tenure track faculty, a position which she held for 17 years before beginning her current position as Assistant Professor of Plant Pathology and Assistant Director of NIMFFAB in 2007.    She is active in the Entomological Society of America and the American Phytopathological Society where she has served/serves as an officer in Insect Vectors of Plant Pathogens and Hemipteran Feeding Network (ESA) and the Vector Complexes (APS) committees.

Dr. Wayadande’s research interests focus on Hemipeteran transmission of plant pathogens and insect (filth fly) transfer of human pathogens to plants. For over 25 years, she has studied the feeding physiology of leafhopper and true bug vectors of plant pathogens.   Using transmission electron microscopy, she described the salivary glands of various vector species and the functional barriers to bacterial movement through vectors.   She is one of only a few scientists experienced in electrical penetration graph (EPG) technology, which produces electrical waveforms representing specific stylet activities of the feeding insect.   Using EPG, she and her students identified specific probing activities responsible for acquisition and/or inoculation of phloem-inhabiting bacteria.   She is also working to develop better molecular tools for field detection of high-impact vectors of exotic plant pathogens.