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Grazing Research & Demonstration – Maus Study Site, Sentinel Butte, ND
& South Fork of Moreau River Site in SD

Scott Kronberg

Question 1: What major problem or issue is being resolved and how are you resolving it?

The major issue being resolved is whether on not breeding of sheep has an important effect on how much leafy spurge they will graze. We are also determining if sheep grazing plus herbicides or sheep grazing plus flea beetles provides more effective control of leafy spurge than any of these treatments alone.

Question 2: How serious is the problem? Why does it matter?

If one or more breeds of sheep graze leafy spurge more readily, they would obviously be the breed(s) to recommend for leafy spurge control. If sheep grazing in combination with herbicide or flea beetles proves to be a more effective means to control leafy spurge in western SD, then this would be important information to share with landowners in western SD.

Question 3: How does it relate to the National Program(s) and National Program Component(s) to which it has been assigned?

The TEAM Leafy Spurge project is a part of the USDA/ARS Area-Wide Management Program. It is a component of Crop and Commodity Pest Biology, Control and Quarantine (304). TEAM Leafy Spurge complements efforts to develop new and improved pest control technologies and assess component technologies for integrated pest management (IPM) systems.

Question 4: What were the most significant accomplishments this past year?

Our most significant accomplishment this past year was to begin our comparison of four breeds of sheep for potential differences in leafy spurge intake and to begin our comparison of leafy spurge control with sheep grazing plus fall-applied herbicide or with flea beetles plus sheep grazing.

Question 5: Describe the major accomplishments over the life of the project, including their predicted or actual impact.

Our major accomplishments over the two-year life of this project has been to: 1) determine that fertilization of leafy spurge with nitrogen is unlikely to increase the control of spurge with grazing sheep or cattle, 2) begin our work comparing breeds of sheep for potential differences in their ability to control leafy spurge intake, and 3) begin our comparison of leafy spurge control with sheep grazing plus fall-applied herbicide or with flea beetles plus sheep grazing.

Question 6: What do you expect to accomplish, year by year, over the next 3 years?

In the next year we expect to continue evaluating breeds of sheep for potential differences in grazing intake of leafy spurge and begin to evaluate the effect of combining sheep grazing with fall-applied herbicide and sheep grazing plus flea beetles for reduction in leafy spurge stem density. In the following two years we plan to continue and complete these same evaluations.

Question 7: What science and/or technologies have been transferred and to whom? When is the science and/or technology likely to become available to the end user (industry, farmer, other scientists)? What are the constraints, if known, to the adoption and durability of the technology products?

So far no technologies have been transferred, but we expect that our work will likely provide useful new information to ranchers/range managers by the end of 2000.

Question 8: List your most important publications in the popular press and presentations to non-scientific organizations and articles written about your work.

None to date.

Question 9: Scientific Publications

None to date.
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