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Molecular characterization of the differential role of immigrant and agrobiont generalist predators in pest suppression
Year:
2012
Source of publication :
biological control (source)
Authors :
Weintraub, Phyllis
;
.
Volume :
63
Co-Authors:
Opatovsky, I., Albert Katz International School for Desert Studies, Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Midreshet Ben-Gurion 84990, Israel
Chapman, E.G., Department of Entomology, University of Kentucky, S225 Agricultural Science Center North, Lexington, KY 40546-0091, United States
Weintraub, P.G., Agricultural Research Organization, Department of Entomology, Gilat Research Center, 85280, Israel
Lubin, Y., Mitrani Department of Desert Ecology, Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Midreshet Ben-Gurion 84990, Israel
Harwood, J.D., Department of Entomology, University of Kentucky, S225 Agricultural Science Center North, Lexington, KY 40546-0091, United States
Facilitators :
From page:
25
To page:
30
(
Total pages:
6
)
Abstract:
Generalist predators in agroecosystems may immigrate into the crop fields from the surrounding environment or may be agrobiont species that maintain stable populations in crop fields but are scarce in natural habitats. This study compared pest consumption of two main spider groups in wheat fields of a semi-desert agroecosystem of Israel, the immigrant spiders of the family Theridiidae (Enoplognatha spp.) and the agrobiont family Linyphiidae, to identify their potential role in biological control. The consumption of pest (aphids and Hessian flies) and non-pest arthropods (Collembola) was examined using PCR-based molecular gut content analysis. We describe the development of one new set of primer pairs targeting Hessian flies. We also used existing aphid- and collembolan-specific primers to test the hypotheses that agrobiont spiders are more likely to consume the most common prey species, while immigrant species will utilize pest prey more frequently than agrobionts. Our results indicated that a significantly higher proportion of immigrating Enoplognatha consumed aphids as compared to the agrobiont linyphiids, which mostly consumed collembolans. The results suggest that Enoplognatha have some degree of prey selection toward the crop pests (aphids). We therefore conclude that immigrant spiders may be particularly important biological control agents in the semi-arid wheat agroecosystem in Israel. © 2012 Elsevier Inc.
Note:
Related Files :
agroecosystem
Aphididae
Enoplognatha
Linyphiidae
Mayetiola destructor
Semi-desert
Theridiidae
Triticum aestivum
wheat
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Related Content
More details
DOI :
10.1016/j.biocontrol.2012.06.003
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
21605
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:45
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Scientific Publication
Molecular characterization of the differential role of immigrant and agrobiont generalist predators in pest suppression
63
Opatovsky, I., Albert Katz International School for Desert Studies, Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Midreshet Ben-Gurion 84990, Israel
Chapman, E.G., Department of Entomology, University of Kentucky, S225 Agricultural Science Center North, Lexington, KY 40546-0091, United States
Weintraub, P.G., Agricultural Research Organization, Department of Entomology, Gilat Research Center, 85280, Israel
Lubin, Y., Mitrani Department of Desert Ecology, Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Midreshet Ben-Gurion 84990, Israel
Harwood, J.D., Department of Entomology, University of Kentucky, S225 Agricultural Science Center North, Lexington, KY 40546-0091, United States
Molecular characterization of the differential role of immigrant and agrobiont generalist predators in pest suppression
Generalist predators in agroecosystems may immigrate into the crop fields from the surrounding environment or may be agrobiont species that maintain stable populations in crop fields but are scarce in natural habitats. This study compared pest consumption of two main spider groups in wheat fields of a semi-desert agroecosystem of Israel, the immigrant spiders of the family Theridiidae (Enoplognatha spp.) and the agrobiont family Linyphiidae, to identify their potential role in biological control. The consumption of pest (aphids and Hessian flies) and non-pest arthropods (Collembola) was examined using PCR-based molecular gut content analysis. We describe the development of one new set of primer pairs targeting Hessian flies. We also used existing aphid- and collembolan-specific primers to test the hypotheses that agrobiont spiders are more likely to consume the most common prey species, while immigrant species will utilize pest prey more frequently than agrobionts. Our results indicated that a significantly higher proportion of immigrating Enoplognatha consumed aphids as compared to the agrobiont linyphiids, which mostly consumed collembolans. The results suggest that Enoplognatha have some degree of prey selection toward the crop pests (aphids). We therefore conclude that immigrant spiders may be particularly important biological control agents in the semi-arid wheat agroecosystem in Israel. © 2012 Elsevier Inc.
Scientific Publication
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