Chia: Host status for meloidogyne incognita and activity of plant extracts

Susan L.F. Meyer, Margaret H. MacDonald, Nathan D. Reetz, Mihail R. Kantor, Lynn K. Carta, Zafar A. Handoo, Mary J. Camp, Tim D. Phillips

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


Chia (Salvia hispanica L.) seeds are used for food, drinks, oil, and animal feed, and all plant parts are employed in traditional medicine. The growing demand for the seed has created a need for improved disease management. Plant-parasitic nematodes have been found on other Salvia spp., but none have been reported from S. hispanica. Chia has also not been tested for production of compounds active against these nematodes. Therefore, aqueous extracts from shoots and roots of six chia lines, Brad's Organic, Cono, E2, G3, G5, and W13.1, were tested in laboratory assays. Some concentrations of all extracts were nematotoxic, killing about one-third of Meloidogyne incognita (Kofoid & White) Chitwood second-stage juveniles (J2s) in shoot extracts and up to nearly half of J2s in root extracts. Hatch was generally not affected by the extracts. In greenhouse trials, all six chia lines were hosts of M. incognita. Chia line G3 had approximately two times or more eggs per gram of root than Brad's Organic or Cono. When cucumber seedlings were transplanted into soil amended with chopped chia shoots (2.3 or 2.5% weight of fresh shoots/weight of dry soil), galling and egg production on cucumber roots were not suppressed. To our knowledge, this is the first report that chia is a host to M. incognita (or any phytoparasitic nematode) and that chia shoots and roots produce compounds active against a nematode.

Original languageEnglish
Pages (from-to)2979-2985
Number of pages7
JournalPlant Disease
Issue number11
StatePublished - Nov 2020

Bibliographical note

Funding Information:
Thanks are extended to Kansiree Jindapunnapat for assistance in the laboratory and greenhouse. Mihail Kantor was supported in part by an appointment to the Research Participation Program at the Mycology and Nematology Genetic Diversity and Biology Laboratory USDA, ARS, Northeast Area, Beltsville, MD, administered by the Oak Ridge Institute for Science and Education through an interagency agreement between the U.S. Department of Energy and USDA-ARS.

Funding Information:
Funding: Funding was provided by ARS in-house funds, also APHIS funding to ARS for ORISE (APHIS project no. to ARS is 8042-22000-300-07I).

Publisher Copyright:
© 2020 American Phytopathological Society. All rights reserved.


  • Chia
  • Meloidogyne
  • Nematode host
  • Plant extract
  • Salvia hispanica
  • Soil amendment

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Plant Science


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