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Funded Project |
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Funding Program:
Regional IPM Grants (S-RIPM) |
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Project Title:
Comprehensive management of plant-parasitic nematodes on peach with cultural practices, novel biorationals, and reduced rates of fumigants |
Project Directors (PDs):
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Lead State: GA Lead Organization: University of Georgia |
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Cooperating State(s):
Florida |
| Undesignated Funding: $168,760 |
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Start Date: Sep-01-2011 End Date: Aug-31-2014 |
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Summary:
This is a joint research-extension project. For extension and research activities, requested funds are $19,398 from Smith-Lever 3(d) and $149,362 from P.L. 89-106. The overall goal is development of novel, reduced-risk, comprehensive management techniques for suppression of peach nematodes (ring, root-knot, and root lesion), and technology transfer of these new methods. Southern region peach producers must increase their efficiency to survive, and this grant directly addresses that need. A multi-faceted approach will be utilized. Tall fescue has shown nematode-suppressive properties, so the first objective will deploy tall fescue as a cover crop, drilled or broadcast, and managed no-till or as green manure; the testing will incorporate resistant rootstocks and fumigation to expand the evaluation into a comprehensive management program. A greenhouse study will further determine the effectiveness of tall fescue for suppression of Meloidogyne floridensis (peach root-knot nematode). Novel biorational nematicides could be utilized for badly-needed postplant nematode management. The second objective will review efficacy of the biorationals Movento, Votivo, Ditera, and GA534 in a series of laboratory, greenhouse, and field microplot experiments, and for Movento only, full-scale field studies will be conducted. When combined with nematodetolerant rootstocks, reduced application rates of conventional fumigant nematicides may be possible. This will be addressed in the third objective; a series of field trials will review rootstock X fumigant (Telone II) interactions with novel application methods. Economic and environmental analyses, conducted under the fourth objective, will determine the value of the new management methods under consideration. Outreach efforts will ensure technology transfer.
Objectives: Objectives and Anticipated Impacts (Research) 1. Develop improved nematode management strategies based on cultural approaches for suppression of ring and (or) root-knot nematode and related peach disease complexes. Impact: Provide the peach industry with a new groundcover that suppresses nematode population densities comparable to preplant fumigation. 2. Evaluate the efficacy of biorational nematicides for controlling root-knot nematodes in peach (Georgia, Florida) Impact: Provide the peach industry with new postplant nematicides for controlling ring and (or) root-knot nematodes in peach at levels comparable to preplant fumigation. Postplant control is absolutely essential to extend the life of peach trees on PTSL sites, since the nematode populations increase and re-establish in the years subsequent to preplant fumigation. 3. Evaluate the efficiency and cost-effectiveness in the application of current preplant nematicide recommendations such as Telone II, including studies related to reduced-rate applications. Impact: Provide the peach industry with an improved efficacious and cost-effective preplant nematicide and rootstock IPM recommendation for nematode management. Objectives and Anticipated Impacts (Extension) 4. Conduct economic assessments and engage in outreach and technology transfer with growers, packers/ shippers, and consumers. Impact: We will be able to provide significant outputs to the industry, extension specialists and agents on effectiveness of reduced nematicide rates, efficacy of novel nematode strategies such as groundcovers and postplant options for reducing nematode populations. This will lead to a medium-term outcome of growers changing their behavior to include more sustainable production practices and a long-term reduction in the amount of nematicides applied in peach orchards. |
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