In vitro nematicidal activity of aqueous plant extracts on Chilean populations of Xiphinema americanum sensu lato

  • V. Insunza
  • E. Aballay
  • J. Macaya
Keywords: antagonistic plants, Chile, grapevine, native plants, nematicidal plants, nematode management, plant extracts, Xiphinema americanum sensu lato

Abstract

In vitro nematicidal activity of aqueous plant extracts on Chilean populations of Xiphinema americanum sensu lato . Nematropica 31:47-54. In a search for alternatives to chemicals in nematode management, the nematicidal activity of 30 plant species (9 native and 21 naturalized in Chile) was tested on a Chilean population of Xiphinema americanum sensu lato , an economically important pathogen in grapevine. Aqueous extracts were tested in a standard concentration (S) at 1:4 W/V of fresh plant material, or 1:20 W/V of air-dried plant parts; and 21 plants, were also tested at 25% of S. Distilled water was used as the control. Nematicidal activity was evaluated by nematode immobility after 24-48 h of immersion in the extracts, followed by 24 h in distilled water. At the standard concentration, all the extracts showed nematicidal or nematostatic activity after 24 h of exposure, but this effect decreased in the dilute treatment of 33% of the extracts, mostly top extracts. Nematode immobilit
Published
2001-06-01
Section
Articles