ScholarsArchive@OSU

Citeable URL: http://ir.library.oregonstate.edu/concern/articles/p5547t008

To the best of our knowledge, one or more authors of this paper were federal employees when contributing to this work. This is the publisher’s final pdf. The published article is copyrighted by the Entomological Society of America and can be found at:  http://www.entsoc.org/Pubs/Periodicals/JEE.

Descriptions

Attribute Name	Values
Creator	Woods, J. L. James, D. G. Gent, D. H. Walsh, D. B. Dreves, Amy J. Lee, J. C.
Abstract or Summary	The temporal development of biological control of arthropod pests in perennial cropping systems is largely unreported. In this study, the development of biological control of twospotted spider mite, Tetranychus urticae Koch, and hop aphid, Phorodon humuli (Schrank), in a new planting of hop in Oregon is described over a period of 9 yr (2005-2013). Both the abundance and diversity of natural enemies increased over time. Known predators of hop aphid (Coccinellidae and Anthocoridae) were present in all years; however, stable biological control of hop aphid was not achieved in most years and aphicides were required to suppress populations at commercially acceptable levels in 5 of 9 yr. Populations of aphidophagous coccinellids developed synchronously with hop aphid populations, and temporal correlations indicated these are the primary predatory insect associated with hop aphid regulation. However, sampling methods did not assess levels of aphid parasitoids and hyperparasitoids and their contribution to biological control was unquantified. Spider mite biological control was associated primarily with predatory mites (Phytoseiidae) and Stethorus spp. (Coccinellidae). The magnitude of temporal correlations of abundance of these predators with spider mites was found to be greatest on the same sampling dates and at lags of 7-14 d. Stable biological control of spider mites occurred after four field seasons, suppressing spider mites to levels similar to those commonly achieved with chemical control. A survey of 11 commercial hop yards in Oregon documented pest and natural enemy densities under commercial management practices over a period of 4 yr (2008-2011). Natural enemy abundance in commercial hop yards was similar to that of a 2- to 3-yr-old hop yard with limited disturbance. Whereas total reliance on biological control for hop aphid is unlikely to be successful, there appears to be unrealized potential for biological control of spider mites in commercial production. Dynamic action thresholds that consider the value of natural enemies are needed for both pests.
Resource Type	Article
DOI	10.1603/EC13488
Date Available	2014-07-15T19:24:27+00:00
Date Issued	2014-04
Citation	Woods, J. L., Dreves, A. J., James, D. G., Lee, J. C., Walsh, D. B., & Gent, D. H. (2014). Development of Biological Control of Tetranychus urticae (Acari: Tetranychidae) and Phorodon humuli (Hemiptera: Aphididae) in Oregon Hop Yards. Journal of Economic Entomology, 107(2), 570-581. doi:10.1603/EC13488
Series	Vol. 107 no. 2 Journal of Economic Entomology
Keyword	conservation biological control integrated pest management cross-correlation
Rights Statement	Copyright Not Evaluated
Funding Statement (additional comments about funding)	Funding for these studies was provided from the Hop Research Council, Oregon State University, Washington Hop Commission, Washington State Commission on Pesticide Registration, Washington State University, U.S. Department of Agriculture-Agricultural Research Service-Current Research Information System Project 5358-21000-046-00D, and U.S. Department of Agriculture-Cooperative State Research, Education, and Extension Service Western IPM Center Award No. 2007-34103-18579.
Publisher	Entomological Society of America
Peer Reviewed	Yes
Language	English [eng]
Replaces	http://hdl.handle.net/1957/50436
Additional Information	description.provenance : Submitted by Erin Clark (erin.clark@oregonstate.edu) on 2014-07-15T19:24:14Z No. of bitstreams: 1 DrevesAmyCropSoilScienceDevelopmentBiologicalControl.pdf: 644401 bytes, checksum: 628251259e2285959c60e044bd3818c8 (MD5) description.provenance : Approved for entry into archive by Erin Clark(erin.clark@oregonstate.edu) on 2014-07-15T19:24:27Z (GMT) No. of bitstreams: 1 DrevesAmyCropSoilScienceDevelopmentBiologicalControl.pdf: 644401 bytes, checksum: 628251259e2285959c60e044bd3818c8 (MD5) description.provenance : Made available in DSpace on 2014-07-15T19:24:27Z (GMT). No. of bitstreams: 1 DrevesAmyCropSoilScienceDevelopmentBiologicalControl.pdf: 644401 bytes, checksum: 628251259e2285959c60e044bd3818c8 (MD5) Previous issue date: 2014-04

Relationships

Parents:

This work has no parents.

Last modified

Items

Thumbnail	Title	Date Uploaded	Visibility	Actions
	DrevesAmyCropSoilScienceDevelopmentBiologicalControl.pdf	2017-07-26	Public	Press to Select an action Download