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Funded Project |
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Funding Program:
Enhancement Grants - Special Projects |
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Project Title:
Assessing the Early-Season Risk of Thrips Vectors of Tomato Spotted Wilt Virus In Solanaceous Crops |
Project Directors (PDs):
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Lead State: GA Lead Organization: University of Georgia |
| Undesignated Funding: $27,902 |
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Start Date: Jul-01-2005 End Date: Jun-30-2006 |
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Pests Involved: Thrips; Tomato Spotted Wilt |
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Site/Commodity: Solanaceae |
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Summary:
This project, first funded in 2004, began with the relatively simple idea, that is, to develop a system for predicting the timing and relative intensity of Tomato spotted wilt virus (TSWV) spread from overwintering hosts into susceptible Solanaceous crops planted in the spring. This was based on a standard sampling technique that was used by technicians in the newly formed TVAC laboratory ( http://www.tomatospottedwiltinfo.org/thrips/index.htm ) and extension agents to assess a modified Relative Inoculum Potential (RIP) Index for TSWV developed by North Carolina State University for Georgia conditions. Although this survey is currently yielding interesting data for TSWV in southern Georgia, the complete assessment of relative risk of TSWV will not be final until after the due date for this grant renewal. What we have found is that pre-season thrips vectors populations, mainly Frankliniella fusca and F. occidentalis, and incidence of TSWV in winter weed hosts varies significantly across locations of tomato and pepper production sites and that these differences appear to be correlated to incidence in the crop. Since management of TSWV in susceptible crops requires control tactics that are mostly selected pre-season, such as metallic silver mulch and TSWV resistant cultivars, the current survey ( http://www.tomatospottedwiltinfo.org/thrips/preseasonrisk.htm ) is meant to assist in this decision making process. These data have already been used to make decisions by Lewis Taylor Farms, Tifton, GA for metallic mulch and resistance tomato. The goal of this project is continue this survey and provide recommendations for TSWV management. We propose to: 1) Continue and expand the extensive survey of thrips vectors of TSWV around commercial tomato and pepper field sites in Georgia and South Carolina with the intent of identifying pre-season risk to the crop and 2) summarize and provide this information in the form of a pest advisory to commercial growers as the data are gathered on the web at the newly established website ( http://www.tomatospottedwiltinfo.org ) developed in the first year of this project.
Objectives: Objective 1: Conduct an extensive survey of thrips vectors of TSWV around commercial tomato, pepper and other Solanaceous crop field sites in Georgia and South Carolina with the intent of identifying pre-season risk to the crop. Objective 2: Refine sampling procedures / guidelines for identifying local, overwintering sources of TSWV inoculum near tomato and pepper and calculating a relative TSWV risk index that can be done by consultants and farmers. |
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