Effect of soil depth and moisture on the vertical distribution of Steinernema riobrave (Nematoda

Steinernematidae)

Dawn H Gouge, Kirk A. Smith, Linda L. Lee, Thomas J. Henneberry

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

The effect of soil moisture on the distribution of Steinernema riobrave in a sand column was determined. Larvae of Pectinophora gossypiella were used to detect S. riobrave infective juveniles (IJ) in each 2.5-cm section of 30-cm-long soil columns. Soil moisture was determined for each section and related to the numbers of nematodes recovered from infected insect baits. Infective juveniles of S. riobrave applied on the sand column surface showed some degree of positive geotaxis. IJ in soil columns with a consistent moisture gradient grouped in the upper 12.7 cm within a water potential range of -40 to -0.0055 MPa (2% to 14% moisture). Nematodes in sand columns that were gradually dehydrating moved down the soil column, aggregating on the 28th day between 15-23 cm in depth. Nematode redistribution over time allowed IJ to remain within a water potential range of -0.1 to -0.012 MPa (5.2% to 9.5% moisture).

Original languageEnglish (US)
Pages (from-to)223-228
Number of pages6
JournalJournal of Nematology
Volume32
Issue number2
StatePublished - Jun 2000

Fingerprint

Steinernema riobravis
Steinernematidae
nematode larvae
soil depth
Nematoda
soil water
sand
water potential
geotaxis
Pectinophora gossypiella
soil
baits
insects
larvae

Keywords

  • Entomopathogenic nematodes
  • Movement
  • Soil moisture
  • Spatial distribution
  • Steinernema riobrave
  • Vertical distribution

ASJC Scopus subject areas

  • Animal Science and Zoology

Cite this

Effect of soil depth and moisture on the vertical distribution of Steinernema riobrave (Nematoda : Steinernematidae). / Gouge, Dawn H; Smith, Kirk A.; Lee, Linda L.; Henneberry, Thomas J.

In: Journal of Nematology, Vol. 32, No. 2, 06.2000, p. 223-228.

Research output: Contribution to journalArticle

Gouge, Dawn H ; Smith, Kirk A. ; Lee, Linda L. ; Henneberry, Thomas J. / Effect of soil depth and moisture on the vertical distribution of Steinernema riobrave (Nematoda : Steinernematidae). In: Journal of Nematology. 2000 ; Vol. 32, No. 2. pp. 223-228.
@article{fa91c9280a4b4f44baa998bf7bdf2750,
title = "Effect of soil depth and moisture on the vertical distribution of Steinernema riobrave (Nematoda: Steinernematidae)",
abstract = "The effect of soil moisture on the distribution of Steinernema riobrave in a sand column was determined. Larvae of Pectinophora gossypiella were used to detect S. riobrave infective juveniles (IJ) in each 2.5-cm section of 30-cm-long soil columns. Soil moisture was determined for each section and related to the numbers of nematodes recovered from infected insect baits. Infective juveniles of S. riobrave applied on the sand column surface showed some degree of positive geotaxis. IJ in soil columns with a consistent moisture gradient grouped in the upper 12.7 cm within a water potential range of -40 to -0.0055 MPa (2{\%} to 14{\%} moisture). Nematodes in sand columns that were gradually dehydrating moved down the soil column, aggregating on the 28th day between 15-23 cm in depth. Nematode redistribution over time allowed IJ to remain within a water potential range of -0.1 to -0.012 MPa (5.2{\%} to 9.5{\%} moisture).",
keywords = "Entomopathogenic nematodes, Movement, Soil moisture, Spatial distribution, Steinernema riobrave, Vertical distribution",
author = "Gouge, {Dawn H} and Smith, {Kirk A.} and Lee, {Linda L.} and Henneberry, {Thomas J.}",
year = "2000",
month = "6",
language = "English (US)",
volume = "32",
pages = "223--228",
journal = "Journal of Nematology",
issn = "0022-300X",
publisher = "Society of Nematologists",
number = "2",

}

TY - JOUR

T1 - Effect of soil depth and moisture on the vertical distribution of Steinernema riobrave (Nematoda

T2 - Steinernematidae)

AU - Gouge, Dawn H

AU - Smith, Kirk A.

AU - Lee, Linda L.

AU - Henneberry, Thomas J.

PY - 2000/6

Y1 - 2000/6

N2 - The effect of soil moisture on the distribution of Steinernema riobrave in a sand column was determined. Larvae of Pectinophora gossypiella were used to detect S. riobrave infective juveniles (IJ) in each 2.5-cm section of 30-cm-long soil columns. Soil moisture was determined for each section and related to the numbers of nematodes recovered from infected insect baits. Infective juveniles of S. riobrave applied on the sand column surface showed some degree of positive geotaxis. IJ in soil columns with a consistent moisture gradient grouped in the upper 12.7 cm within a water potential range of -40 to -0.0055 MPa (2% to 14% moisture). Nematodes in sand columns that were gradually dehydrating moved down the soil column, aggregating on the 28th day between 15-23 cm in depth. Nematode redistribution over time allowed IJ to remain within a water potential range of -0.1 to -0.012 MPa (5.2% to 9.5% moisture).

AB - The effect of soil moisture on the distribution of Steinernema riobrave in a sand column was determined. Larvae of Pectinophora gossypiella were used to detect S. riobrave infective juveniles (IJ) in each 2.5-cm section of 30-cm-long soil columns. Soil moisture was determined for each section and related to the numbers of nematodes recovered from infected insect baits. Infective juveniles of S. riobrave applied on the sand column surface showed some degree of positive geotaxis. IJ in soil columns with a consistent moisture gradient grouped in the upper 12.7 cm within a water potential range of -40 to -0.0055 MPa (2% to 14% moisture). Nematodes in sand columns that were gradually dehydrating moved down the soil column, aggregating on the 28th day between 15-23 cm in depth. Nematode redistribution over time allowed IJ to remain within a water potential range of -0.1 to -0.012 MPa (5.2% to 9.5% moisture).

KW - Entomopathogenic nematodes

KW - Movement

KW - Soil moisture

KW - Spatial distribution

KW - Steinernema riobrave

KW - Vertical distribution

UR - http://www.scopus.com/inward/record.url?scp=0034336778&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0034336778&partnerID=8YFLogxK

M3 - Article

VL - 32

SP - 223

EP - 228

JO - Journal of Nematology

JF - Journal of Nematology

SN - 0022-300X

IS - 2

ER -