| Creator |
|
|---|
| Abstract |
- 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 |
|
|---|
| DOI |
|
|---|
| Date Available |
|
|---|
| Date Issued |
|
|---|
| 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
|
|---|
| Journal Title |
|
|---|
| Journal Volume |
|
|---|
| Journal Issue/Number |
|
|---|
| Keyword |
|
|---|
| Rights Statement |
|
|---|
| 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 |
|
|---|
| Peer Reviewed |
|
|---|
| Language |
|
|---|
| Replaces |
|
|---|
| 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
|
|---|