Seminar: Improving Management of the Northern Root-Knot Nematode, Meloidogyne hapla, in Potato in New York State

Adrienne Gorny, Ph.D. student, Plant Pathology, School of Integrative Plant Science, Plant Pathology and Plant-Microbe Biology Section, Cornell University
Adrienne Gorny, Cornell University

Adrienne Gorny, Cornell University

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When (Date/Time)

April 9, 2018, 3:35 PM - 4:30 PM

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The Northern root-knot nematode, Meloidogyne hapla, and lesion nematode, Pratylenchus penetrans, are important soilborne pathogens of potato and other vegetable crops in New York and the northeastern United States.  In potato, these nematodes may cause yield reductions and crop damage.  Damage from nematode feeding to potato tubers reduces quality and may render fresh-market tubers unmarketable.  Populations are often controlled by routine and prophylactic pesticide applications including fumigant or non-fumigant nematicides. However, if populations are below the damage threshold, control may not be warranted. The severity of nematode and other soilborne diseases may be well characterized by quantifying the initial inoculum present within a field, yet the threshold for M. hapla and P. penetrans in fresh-market potato production is not well understood. Furthermore, DNA-based technologies may be superior for the quantification of nematode populations compared to traditional enumeration techniques.  The goal of my work to develop risk algorithms for quantifying the relationship between M. hapla and P. penetrans DNA from soil prior to planting and potato crop loss and damage at harvest, and inform when pesticides or other strategies are justified.  To achieve this goal, I aim to develop a M. hapla-specific quantitative PCR test targeting a nematode effector gene, evaluate the relationship between pre-plant nematode DNA to potato yield and damage, and characterize the susceptibility of fresh market potato cultivars.  Within this seminar, I will present finding from on-farm surveys conducted to relate yield loss and crop damage to nematode population densities.  The holistic goal of my research is to provide a framework for development of a decision support system that utilizes pre-plant soil testing for DNA-based quantification of M. hapla and P. penetrans, and risk assessment in potato production in New York State.

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