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Web URL(s): | http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2620435/pdf/223.pdf Last checked: 07/08/2013 Requires: Adobe Flash http://journals.fcla.edu/jon/article/view/67146/64814 Last checked: 08/17/2018 Requires: PDF Reader |
Publication Type:
| Refereed |
Author(s): | Gouge, Dawn H.;
Smith, Kirk A.;
Lee, Linda L.;
Henneberry, Thomas, J. |
Author Affiliation: | Gouge: University of Arizona, Department of Nematology, Maricopa, AZ; Smith: University of Arizona, Maricopa Agricultural Center, Maricopa, AZ; Lee and Henneberry: Western Cotton Research Laboratory, USDA, ARS, Pacific West Area, Phoenix, AZ |
Title: | Effect of soil depth and moisture on the vertical distribution of Steinernema riobrave (Nematoda: Steinernematidae) |
Source: | Journal of Nematology. Vol. 32, No. 2, June 2000, p. 223-228. |
Publishing Information: | Lake Alfred, FL: Society of Nematologists |
# of Pages: | 6 |
Related Web URL: | http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2620435/ Last checked: 07/08/2013 Notes: Abstract only |
Keywords: | TIC Keywords: Soil depth; Soil moisture; Ecological distribution; Population dynamics; Steinernema riobrave; Entomopathogenic nematodes; Density
|
Abstract/Contents: | "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 ā»40 to ā»0.0055 MPa (2% to 14% moisture). Nematodes in sand colomns 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 ā»0.1 to ā»0.012 MPa (5.2% to 9.5% moisture). |
Language: | English |
References: | 23 |
Note: | Tables Graphs |
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete): Gouge, D. H., K. A. Smith, L. L. Lee, and T. J. Henneberry. 2000. Effect of soil depth and moisture on the vertical distribution of Steinernema riobrave (Nematoda: Steinernematidae). J. Nematol. 32(2):p. 223-228. |
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| Web URL(s): http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2620435/pdf/223.pdf Last checked: 07/08/2013 Requires: Adobe Flash http://journals.fcla.edu/jon/article/view/67146/64814 Last checked: 08/17/2018 Requires: PDF Reader |
| MSU catalog number: QL 386 .A1 J66 |
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