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Funded Project |
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Funding Program:
Regional IPM Grants (S-RIPM) |
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Project Title:
Integrated Strategies for Sustainable Herbicide Resistance Mitigation and Management in Barnyardgrass in Midsouth Rice |
Project Directors (PDs):
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Lead State: AR Lead Organization: University of Arkansas |
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Cooperating State(s):
Louisiana, Mississippi |
| Extension Funding: $25,000 |
| Research Funding: $108,890 |
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Start Date: Sep-01-2012 End Date: Aug-31-2015 |
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Summary:
This Joint Research-Extension project focuses on establishing an integrated approach for prevention/management of herbicide resistance in barnyardgrass in the Midsouth, with $108,890 and $25,000 budgeted for Research and Extension, respectively. Rice is an important crop in the Midsouth, with barnyardgrass being the major weed. Barnyardgrass management has been extensively dependent on herbicides, which eventually led to widespread herbicide resistance, making most of the existing weed management practices unsustainable. We hypothesize that sustainable weed management will require integration of non-chemical strategies, which will lessen the selection pressure exerted by herbicides and in turn delay the evolution and spread of resistance. The specific research objectives of this project are to: 1) Develop a simulation model for predicting the simultaneous evolution of barnyardgrass resistance to ALS- and ACCase-inhibiting herbicides, 2) Understand, using the model, the influence of various non-chemical weed management practices in delaying resistance evolution, and 3) Validate the model using empirical data collected from the real system, and identify integrated strategies for combating herbicide resistance. To address these objectives, a herbicide resistance simulation model will be developed for barnyardgrass, and the model will be validated using field collected data. Suitable best management practices (BMPs) will be established based on the model predictions. The objective of the extension component is to develop and deliver an educational program that utilizes the established BMPs to growers and other stakeholders for combating herbicide-resistance in barnyardgrass. Overall, this project is highly relevant to the goals of the S-RIPM program in that it will aid in avoiding/mitigating
Objectives: Research Objectives: Use a modeling approach to: 1) Develop a simulation model for predicting the simultaneous evolution of barnyardgrass resistance to ALS- and ACCase-inhibiting herbicides, practices in delaying resistance evolution, and 3) Validate the model using empirical data collected from the real system, and identify integrated strategies for combating herbicide resistance. Extension Objective: Develop and deliver an educational program to growers, consultants, farm co-ops, and industry representatives for combating herbicide-resistant barnyardgrass that utilizes established best management practices (BMPs). |
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