Thesis
Effectiveness of reduced-cost management of green peach aphid in potato with single treatment seed-applied neonicotinoid insecticide, and definition and linkage of parasitoid guilds of aphids in potatoes and rabbitbrush in Washington state
Washington State University
Master of Science (MS), Washington State University
2011
Handle:
https://hdl.handle.net/2376/102589
Abstract
Green peach aphid (GPA), Myzus persicae (Sulzer), is the perennial key arthropod pest of potatoes in Washington State. Field surveys have demonstrated that GPA accounts for 99% of the aphids that feed on potatoes, and by virtue of its great abundance and remarkable efficiency in transmitting viruses GPA is the main aphid of concern. Economic losses attributable to viruses transmitted by GPA can be substantial. Average losses in processed tubers due to aphid-transmitted potato leafroll virus (PLRV) are variable, but can reach levels of 10% or more. A loss of 10% in processed tubers equates to a shortfall of about $480/acre or $480,000/100-acre circle. Currently growers are being forced by external socioeconomic forces to move rapidly from a pest management approach based largely on zero tolerance and calendar sprays to a more risk-based mitigation approach where pest monitoring, carefully targeted chemical treatment and natural enemy conservation are the norm. Results of this study demonstrates the effectiveness of seed-applied neonicotinoid insecticide for reduced-cost management of GPA in potatoes (approach is expected to become the industry standard for managing GPA). Presently, it is unknown if green or gray rabbitbrush common in Washington's main potato region has conservation value as a reservoir and source of parasitoids of merit for GPA. This study defines the parasitoid guild of aphids on rabbitbrush, and delineates the parasitoid species with cross-over capabilities between aphids of rabbitbrush and potatoes.
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Details
- Title
- Effectiveness of reduced-cost management of green peach aphid in potato with single treatment seed-applied neonicotinoid insecticide, and definition and linkage of parasitoid guilds of aphids in potatoes and rabbitbrush in Washington state
- Creators
- Erin Naomi Hollingbery
- Contributors
- Keith S. Pike (Degree Supervisor)
- Awarding Institution
- Washington State University
- Academic Unit
- Entomology, Department of
- Theses and Dissertations
- Master of Science (MS), Washington State University
- Publisher
- Washington State University; [Pullman, Washington] :
- Identifiers
- 99900525146901842
- Language
- English
- Resource Type
- Thesis