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| DOI: | 10.1016/S0929-1393(96)00121-7 |
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| Web URL(s): | http://www.sciencedirect.com/science/article/pii/S0929139396001217
Last checked: 05/28/2014
Access conditions: Item is within a limited-access website
Notes: Guide page |
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| Publication Type:
| Refereed |
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| Author(s): | Koppenhöfer, Albrecht M.;
Kaya, Harry K. |
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| Author Affiliation: | Department of Nematology, University of California, Davis, CA |
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| Title: | Coexistence of two steinernematid nematode species (Rhabditida: Steinernematidae) in the presence of two host species |
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| Source: | Applied Soil Ecology. Vol. 4, No. 3, November 1996, p. 221-230. |
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| Publishing Information: | [Amsterdam] : Elsevier Science |
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| # of Pages: | 10 |
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| Keywords: | TIC Keywords: Nematoda; Interactions; Agrotis ipsilon; Cyclocephala hirta; Steinernema riobrave; Steinernema carpocapsae; Steinernema glaseri; Soil biology; Biological control; Entomopathogenic nematodes
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| Abstract/Contents: | "Interactions between entomopathogenic nematode species with different foraging strategies were examined in the presence of two host species in soil. Based on differences in insect behavior and nematode pathogenicity, we hypothesized that black cutworm, Agrotis ipsilon (Hufnagel), larvae would be more likely to serve as hosts for Steinernema carpocapsae or Steinernema riobravis, whereas masked chafer grubs, Cyclocephala hirta LeConte, would be more likely to serve as hosts for Steinernema glaseri. In the laboratory, the highest mortality of and nematode penetration in A. ipsilon were observed for S. carpocapsae followed by S. riobravis and S. glaseri. In C. hirta, substantial mortality and nematode penetration were only observed for S. glaseri. After combined applications of two nematode species, S. carpocapsae dominated over S. glaseri in A. ipsilon, whereas S. glaseri and S. riobravis shared the host resources. In C. hirta, S. glaseri outcompeted each of the other species. In the greenhouse, containers with turfgrass were inoculated with S. glaseri, S. carpocapsae, or S. riobravis, or combinations of S. glaseri with either S. carpocapsae or S. riobravis. Four days later, each container received seven A. ipsilon and nine C. hirta larvae, and new insects were added at 30-day intervals. The densities of infective juvenile nematodes were monitored over 150 days by taking soil samples from each container. In the single species treatments, numbers of S. carpocapsae and S. riobravis increased after 30 days, decreased thereafter and remained low. Steinernema glaseri numbers fluctuated between low and high densities. In the combination of S. glaseri and S. carpocapsae, both species were depressed compared with the single species treatment. In the combination of S. glaseri and S. riobravis, both species coexisted and showed parallel fluctuations but S. glaseri dominated numerically. Our observations indicate that two entomopathogenic nematode species may successfully coexist in an area by having different foraging strategies that separate nematode species spatially, exhibiting host specificity, and occupying a different niche. In the field, patchy distribution and alternate hosts may also support nematode coexistence." |
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| Language: | English |
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| References: | 41 |
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| Note: | Tables
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Koppenhöfer, A. M., and H. K. Kaya. 1996. Coexistence of two steinernematid nematode species (Rhabditida: Steinernematidae) in the presence of two host species. Applied Soil Ecology. 4(3):p. 221-230. |
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| DOI: 10.1016/S0929-1393(96)00121-7 |
| Web URL(s):
http://www.sciencedirect.com/science/article/pii/S0929139396001217
Last checked: 05/28/2014
Access conditions: Item is within a limited-access website
Notes: Guide page |
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MSU catalog number: QH541.5.S6 Online |
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