Patrick O'Briant

Research advisor: Antonio DiTommaso

Educational Pathway

• Cornell University, Ithaca NY, M.S., Agronomy - Expected December 2023
• Cornell University, Ithaca, NY, B.S., Plant Sciences - May 2019
• Tompkins Cortland Community College, Cortland, NY, Associate of Science, Environmental Studies - December 2016
• University of Arkansas at Little Rock, Little Rock, AR - September 2009 – April, 2010

Scientific Interests

• Agroecology
• Integrated Pest Management
• Biological Weed and Pest Management

Research

My research focuses on Johnsongrass (Sorghum halepense) performance and survival at the northern periphery of its geographic range in the Northeastern United States.  We have collected populations of johnsongrass from various regions of New York State to determine the effects of localized adaptation to climatic conditions and how quickly these populations can spread once introduced.  We are specifically interested in the potential for adaptations that allow johnsongrass to survive winter conditions as a perennial.  Johnsongrass normally reproduces as an annual in colder climates because the rhizomes are not tolerant of cold winter temperatures in these northern climates.  We are also examining the direct competitive effects of johnsongrass in a silage corn agroecosystem under two different climatic zones common to New York State.  We will use the information gained from these studies to develop practical and effective management strategies for New York State growers.