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Nicholas T Harre

Botany and Plant Pathology 

  • Visiting Scholar
LILY Room 1364/1370

 General Information

Dr. Harre is a Visiting Scholar in the Weed Science lab of Dr. Bryan Young and holds M.S. and Ph.D. degrees from Southern Illinois University and Purdue University, respectively.  His past research has identified specific weed removal timings in soybean to circumvent nutrient competition and grain yield loss, while also hastening nutrient cycling from decaying weed residues.  He has also performed detailed investigations to better characterize glyphosate-resistant giant ragweed with the rapid response (aka, phoenix) phenotype.  These include projects that have: documented the geographical spread over time in Indiana; identified antagonism of selective herbicides by glyphosate and potential management tactics to improve efficacy, and; explored a series of antioxidant enzymes partially responsible for this novel form of glyphosate resistance.  Dr. Harre’s primary responsibilities for this appointment are data analysis and manuscript preparation of various research projects in the Weed Science program with the goal of disseminating findings via conference proceedings and peer-reviewed journals.


Selected Publications

  • Harre NT, Nie H, Jiang Y, Young BG (2018) Differential antioxidant enzyme activity in rapid-response glyphosate-resistant Ambrosia trifida. Pest Manag Sci:10.1002/ps.4909
  • Harre NT, Young JM, Young BG (2018) Environmental factors moderate glyphosate-induced antagonism of POST herbicides on the rapid response biotype of glyphosate-resistant giant ragweed (Ambrosia trifida). Weed Sci:10.1017/wsc.2017.77
  • Harre NT, Young JM, Young BG (2018) Glyphosate-induced antagonism in rapid response giant ragweed (Ambrosia trifida). Weed Technol 32:52-59
  • Harre NT, Nie H, Robertson RR, Johnson WG, Weller SC, Young BG (2017) Distribution of herbicide-resistant giant ragweed (Ambrosia trifida) in Indiana and characterization of distinct glyphosate-resistant biotypes. Weed Sci 65:699-709
  • Harre NT, Schoonover JE, Young BG (2014) Decay and nutrient release patterns of weeds following post-emergent glyphosate control. Weed Sci 62:588-596



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