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Effects of Seed Treatments and a Soil-applied Nematicide on Corn Yields and Nematode Population Densities
Iowa State Research Farm Progress Reports
  • Gregory L. Tylka, Iowa State University
  • Mychele Batista Da Silva, Iowa State University
  • Mark A. Licht, Iowa State University
  • Kent R. Berns, Iowa State University
Ag Engineering/Agronomy, Central Iowa and BioCentury Research Farms
Extension Number
RFR A11137
Publication Date
Plant-parasitic nematodes are microscopic worms that feed on plants. Almost every nematode that feeds on corn is capable of feeding on many other plants. These nematode parasites are thought to be native to most Iowa soils and to have fed upon native plants before corn was grown as a cultivated crop. Population densities (numbers) of most species of plant-parasitic nematodes that feed on corn have to increase to damaging levels (called damage thresholds) before yield loss occurs. Products that are currently available to manage plant-parasitic nematodes on corn in the state include the soil-applied insecticide/nematicide Counter® and two relatively new protectant seed treatments, Avicta® and Votivo®. Counter® is a contact and systematic nematicide with the active ingredient terbufos. Avicta® is a contact nematicide (active ingredient abamectin) that moves on the surface of the root, and Votivo® is a special strain of the natural soil bacterium Bacillus firmus that grows on the root. Counter® is available from AMVAC, Avicta® from Syngenta Seedcare, and Votivo® from Bayer CropScience. The objective of this experiment was to assess and compare the nematode population densities and yields of corn growing in plots with and without the seed-treatment nematode protectants and the soil-applied nematicide Counter®.
Copyright Owner
Iowa State University
File Format
Citation Information
Gregory L. Tylka, Mychele Batista Da Silva, Mark A. Licht and Kent R. Berns. "Effects of Seed Treatments and a Soil-applied Nematicide on Corn Yields and Nematode Population Densities" (2012)
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