Effects of entomopathogenic nematodes on Meloidogyne javanica on tomatoes and soybeans

Declan J. Fallon, Harry K. Kaya, Randy Gaugler, Brent S. Sipes

Research output: Contribution to journalArticlepeer-review

24 Scopus citations

Abstract

Two Hawaiian isolates of Steinernema feltiae MG-14 and Heterorhabditis indica MG-13, a French isolate of S. feltiae SN, and a Texan isolate of S. riobrave TX were tested for their efficacy against the root-knot nematode, Meloidogyne javanica, in the laboratory and greenhouse. Experiments were conducted to investigate the effects of treatment application time and dose on M. javanica penetration in soybean, and egg production and plant development in tomato. Two experiments conducted to assess the effects of entomopathogenic nematode application time on M. javanica penetration demonstrated that a single application of 104 S. feltiae MG-14 or SN infective juveniles per 100 cm3 of sterile soil, together with 500 (MG-14) or 1,500 (SN) second-stage juveniles of M. javanica, reduced root penetration 3 days after M. javanica inoculation compared to that of a water treatment. Entomopathogenic nematode infective juveniles applied to assess the effects on M. javanica egg production did not demonstrate a significant reduction compared to that of the water control treatment. There was no dose response effect by Steinernema spp. on M. javanica root penetration or egg production. Steinernema spp. did not affect the growth or development of M. javanica-infected plants, but H. indica MG-13-treated plants had lower biomass than untreated plants infected with M. javanica. Infective juveniles of S. riobrave TX, S. feltiae SN, and MG-14 but not those of H. indica MG-13 were found inside root cortical tissues of M. javanica-infected plants. Entomopathogenic nematode antagonism to M. javanica on soybean or tomato was insufficient in the present study to provide a consistent level of nematode suppression at the concentrations of infective juveniles applied.

Original languageEnglish (US)
Pages (from-to)239-245
Number of pages7
JournalJournal of Nematology
Volume34
Issue number3
StatePublished - Sep 2002

All Science Journal Classification (ASJC) codes

  • Agronomy and Crop Science

Keywords

  • Behavior
  • Heterorhabditis
  • Meloidogyne javanica
  • Root penetration
  • Steinernema
  • Suppression

Fingerprint

Dive into the research topics of 'Effects of entomopathogenic nematodes on Meloidogyne javanica on tomatoes and soybeans'. Together they form a unique fingerprint.

Cite this