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Funded Project |
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Funding Program:
Addressing Western IPM Issues |
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Project Title:
Integrating Biological Control and Targeted Sheep Grazing to Suppress Spotted Knapweed |
Project Directors (PDs):
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Lead State: MT Lead Organization: Montana State University |
| Undesignated Funding: $76,286 |
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Start Date: Jan-01-2009 End Date: Dec-31-2010 |
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Pests Involved: Centaurea stoebe |
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Site/Commodity: rangeland/habitat |
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Area of Emphasis: Biological control/Targeted grazing |
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Summary:
The goals of this project are to evaluate the effects of combining targeted sheep grazing and biological control to suppress spotted knapweed (Centaurea stoebe L.) and to determine the effects of targeted sheep grazing on biological control insect presence and activity. Plots will be treated with biological control only (BC) or biological control + sheep grazing(BCSG). Objectives include comparing the effects of BC vs. BCSG on: 1) number of biological control insects present; 2) insect activity on buds and roots; and 3) number of viable spotted knapweed seeds per plant; and 4) extending results. This project, which is widely supported by stakeholder groups in the West, proposes non-pesticide, environmentally sound tactics. Results from this research will help explain ecological relationships between biological control insects and sheep, and the ecological response of spotted knapweed to defoliation by the two control agents. Results will be extended through a variety of mediums.
Objectives: Objective 1: Compare the effects of biological control vs. biological control + sheep grazing on the number of adult biological control insects present: 1) immediately following the sheep grazing period (July), and 2) at spotted knapweed senescence (September). Objective 2: Compare the effects of biological control vs. biological control + sheep grazing on the occurrence of pupae and larvae in buds/flower heads and roots at spotted knapweed senescence. Objective 3: Compare the effects of biological control vs. biological control + sheep grazing on the number of viable spotted knapweed seeds present per plant at spotted knapweed senescence. Objective 4: Present research results to interested groups and individuals through national, regional, and local professional meetings; field days; and working group meetings. |
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