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Funded Project |
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Funding Program:
Integrated Pest Management Competitive Grants Program |
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Project Title:
An integrated weed management approach for controlling kochia in wheat using physical and cultural tactics |
Project Directors (PDs):
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Lead State: UT Lead Organization: Utah State University |
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Cooperating State(s):
Idaho |
| Undesignated Funding: $29,971 |
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Start Date: Mar-01-2018 End Date: Mar-01-2019 |
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Pests Involved: Kochia |
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Site/Commodity: Wheat |
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Area of Emphasis: Production Agriculture |
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Summary:
Weeds affect production systems by reducing yields, impeding harvest operations, and increasing the soil weed seed bank. In conventional systems, herbicides are most commonly used to control weeds, yet efficacy is declining for some of the most challenging weeds, such as kochia. Therefore, finding alternative ways to enhance the competitive ability of crops is critical in limiting the growth of kochia and its detrimental effects on production systems. By incorporating physical (cover crops and mulches) and cultural (planting rates/dates) tactics into an integrated weed management approach, resistance to herbicides is avoided and crop yields are sustained. In this 1-year preliminary study, tests will be conducted using cover crops and mulches to suppress kochia and planting dates that avoid kochia emergence and rates that provide the crop with a competitive advantage. Grower farms and university land with moderate to heavy infestations of kochia will be used as field sites. Non-destructive measurements (e.g., efficacy) will be taken during active crop growth and destructive samples (e.g., biomass) will be taken at the end of the season. Through this study, a combination of physical tactics that are matched with a set of cultural tactics will be identified specifically for controlling kochia in the wheat growing regions of Utah and southern Idaho. As an outcome, growers will be surveyed at a late summer field day to determine the value of the approach and to develop follow-up studies.
Objectives: The objective of this study is to evaluate the influence of cover crops, mulches, and planting dates and rates on kochia populations in wheat fields of Utah and southern Idaho. Planting dates and rates will be assessed as secondary tactics (e.g., early or late season plantings – avoidance, size advantage; high rates – resource use, competitive advantage) against kochia in combination with cover crops and mulch as primary tactics (see Table 1). |
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