|
Education
Research Interests
Courses Taught
Graduate Student Projects
Major Project Activities
Extension Interests
Publications
Honors and awards
Professional Activities
Education
B.
S. Plant Protection, University of Belgrade, 1986
M. S. Crop Science (Weed Science), University of Guelph, 1993
Ph. D. Agronomy (Weed Science), Kansas State University, 1997
Research
Interests (50% appointment)
The
objective of my research program is to develop weed control strategies
based on a multidisciplinary approach that builds bridges among scientific
disciplines, especially between weed/crop ecology and herbicide technology.
A single weed control measure is not feasible due to the number of different
weed species and their highly variable life cycles. My program, therefore,
advocates a combination of weed control methods (the use of many "little
hammers").
My
interests include, but are not limited to, weed ecology, crop-weed interactions
as affected by cropping practices and nutrient management, herbicide technology
and systems simulation.
Courses Taught
AGRON 822-Integrated Weed Management, Spring semester in odd years.
Graduate Student Projects
Sean Evans (MS), 1999-2001, Critical period of weed control in corn.
Shawn Hock (MS), 2001-2004, Competitiveness of major weed species in soybean.
Travis Gustafson (MS), 2002-2005, Effects of early season insect defoliation
on the critical time for weed removal in soybean.
Katie Wrade (MA), 2003-2005. Field sandbur control in corn.
Aaron Queen (MS), 2004-2006, Mapping likely areas for purple loosestrife
infestation using simple weighted GIS model.
Jim Schoenberg (MA-part time), 2005-present. Western ragweed control in
pasture
Janyce Woodard (PhD, part time), 2004-present. Riparian buffer crops:
quantifying
species growth and weed control.
Major Project Activities
Current program activities (Year 2007):
I. Herbicide screening: 35 herbicide trials in corn, soybean, rangeland,
pasture and wetlands.
II. Soybean and corn variety trials: A total entry of about 120 soybean
and 80 corn varieties
III. Major research projects:
1. Weed control in organic cropping systems. Specific area of this research
project includes studying various non-chemical weed control options with
emphasis on weed flaming. Specific goal is to develop dose response curves
for propane, and from those curves to determine biologically effective
dose needed for weed flaming procedures on selected crop and weed species.
The overall goal is to aid in developing cost effective integrated weed
management system for organic crop production.
2. Weed control in wetlands. Specific area of this research project includes
studying interaction between soil nutrients, soil pH, and herbicides in
order to develop long term control strategies for invasive plant species
on sandbars in the wetlands of the Lewis and Clark lake in northeast Nebraska.
The overall goal is to develop cost effective integrated weed management
system that minimize reliance on herbicides, and to manage vegetation
to prevent the loss of the nesting habitat for piping plover (Charadrius
melodus) and interior least tern (Sterna antillarum) along Missouri river.
3. Winter annual weed control with Fall applied herbicides.
4. Control of problem weeds in Roundup-Ready soybeans. Objectives are
determine: (1) Biologically effective rates of Glyphosate used alone,
(2) tank mixes of glyphosate and other POST herbicides and (3) soil applied
(PRE) herbicides for problem weeds in soybean. The list of weed species
includes: morninglory, bindweed, buckwheat, Pennsylvania smartweed, Venice
mallow, sweet clover, velvetleaf, lamb's-quarters, and nightshade. Funded
by the Nebraska Soybean Board.
5. Integrated management of Purple loosestrife. Purple loosestrife has
a devastating impact on wetland by out-competing native plants and creating
habitat that is not suitable for wildlife. As part of the long study,
we are testing various control methods including herbicides, repeated
disking, repeated mowing, planting replacement species and burning. Herbicide
control studies are at 4 locations along the Missouri, Niobrara and Platte
rivers.
Extension
Interests (50% appointment)
-
To keep crop producers up to date with the current weed control issues.
.-
To respond promptly and accurately to the regional needs and requests
related to weed control and crop production.
-
To utilize various distance education tools in order to dissiminate information
to county educators, crop consultants, growers, and the public in general.
Selected
Extension Publications:
1. Wilson R. and Knezevic S. 2007. Salt cedar. UNL-Extension
Publication. EC-07-
2. Knezevic et al. 2005. Integrated Management of eastern red cedar. UNL-Extension
Publication. EC-05-186
3. Knezevic, Z. S. 2003. Purple loosestrife. UNL-Extension Publication.
EC-03-176.
4. Anderson B.E. Knezevic, et al.2003. Alfalfa in Nebraska. EC03-181.
5. Heckmen and Knezevic et al. 2002. Spotted and Diffuse Knapweed. UNL-Extension
Publication. EC-02-173-S.
6. Knezevic, Z. S. 2002. Use of herbicide tolerant crops as a component
of an integrated
weed management program. NebGuide, UNL-Extension Publication. G02-148-A.
7. Hunt T. and S. Knezevic, 2002. Monitoring Procedures for Galerucella
Beetles to
Control Purple Loosestrife. Extension Circular. UNL-Extension Publication.
EC02-175.
8. Knezevic, S. and D. Smith. 2001. Rearing and Releasing Galerucella
Beetles to
Control Purple Loosestrife.NebGuide. UNL-Extension Publication. G01-1436-A.
Selected
Research Publications: 9.
Elmore, R. W. , F. W. Roeth, L. A. Nelson, C. A. Shapiro, R. N. Klein,
S. Z.
Knezevic, and A. Martin. 2001. Glyphosate-resistant soybean cultivar yields
compared to sister lines. Agron. Journal.93,2:408-412.
10. Elmore, R. W., F. W. Roeth, R. N. Klein, S. Z. Knezevic, A. Martin,
L. A. Nelson,
and C. A. Shapiro. 2001. Glyphosate-resistant soybean cultivar response
to
glyphosate. Agron. 93, 2:404-407.
11. Knezevic, Z. S., M. J. Horak and R. L. Vanderlip. 2001. Relative time
of
Amaranthus retroflexus affects partitioning of dry matter. Weed Science.
49:617-621.
12. Shrestha, A., S. Z. Knezevic, R. C. Roy, B. Ball-Coelho, and C. J.
Swanton. 2002.
Effect of tillage, cover crop and crop rotation on the composition of
weed flora in
a sandy soil. Weed Research 42:76-87.
13. Knezevic Z. S., S. P. Evans, E. Blankenship,R. VanAcker and J. L.
Lindquist. 2002.
Critical period of weed control: The concept and data analysis. Weed Sci.
50(6)773-786.
14. Evans S. P., S. Z. Knezevic, C. Shapiro and J. L. Lindquist. 2003.
Nitrogen level
affects critical period for weed control in corn. Weed Sci. 51: 408-417.
15. Evans S, S. Z. Knezevic, C. Shapiro and J. L. Lindquist. 2003. Influence
of nitrogen
level and duration of weed interference on corn growth and development.
Weed
Sci.51 546-556.
16. Knezevic, S., S.Evans and M.Mainz. 2003. Yield Penalty Due to Delayed
Weed
Control in Corn and Soybean. Crop Management Journal online: http://www.plantmanagementnetwork.org/pub/cm/research/2003/delay/
17. Knezevic, Z. S., S.Evans and M.Mainz. 2003. Row spacing influences
critical time of
weed removal in soybean. Weed Tech. 17:666-673.
18. Knezevic, Z. S. and. K. Cassman. 2003. Use of herbicide tolerant crops
as a
component of an IWM. Crop Management. J. online: http://www.plantmanagementnetwork.org/pub/cm/management/2003/htc/
19. Blankenship E., W. Stroup, Evans S. P., and S. Z. Knezevic. 2003.
Statistical
Inference for Calibration Points in Nonlinear Mixed Effects Models. Journal
of
Agricultural, Biological and Environmental Statistics. Vol 8, No 4, 455-468.
20. Knezevic, Z. S.,A. Kantrovich, and B. Masters. 2003. Eastern Red Cedar
Control in
Pasture. Crop Management Journal. http://www.plantmanagementnetwork.org/pub/cm/management/2003
21. Schmidt, A, W. Johnson, A. Martin, S. Z. Knezevic,..et al. 2005. Evaluation
of Corn (Zea mays L.) Yield Loss Estimations by WeedSOFT in the North
Central Region. Weed Tech. 19:1056-1064.
22. Knezevic, Z. S et al.. 2004. Purple loosestrife control using herbicides:
Single year
application. Weed Tech. 18:1255-1260.
23. HockS., S.Knezevic, A.Martin and J,Lindquist. 2005. Influence of soybean
row width
and velvetleaf emergence time on velvetleaf. Weed Sci 53:160-165, 2005.
24. Kappler B., S. Knezevic, et al. 2005. Comparison of Glyphosate-Based
Herbicides in
Nebraska. Crop Management Journal.
http://www.plantmanagementnetwork.org/pub/cm/management/2005
25. Hock, S, S. Knezevic, C.Petersen, J.A. Easton, and A.R. Martin (2005-06-28).
Germination Techniques for Common Lambsquarter and Pennyslvania
Smartweed. Weed Technology, 20:530-534.
26. Hock, S, S. Knezevic, A. R. Martin, and J. L. Lindquist. 2006. Performance
of
WeedSOFTR for predicting soybean yield loss. Weed Technology 20:478-484.
27. Barker, D. C., S. Z. Knezevic, and J. L. Lindquist. 2006. Effect of
nitrogen addition
on the comparative productivity of corn and velvetleaf (Abutilon theophrasti).
Weed Science 54:354-363.
28. Gustafson T, S. Knezevic, T. Hunt and J.Lindquist. 2006. Early-season
insect
defoliation influences the critical time for weed removal in soybean.
Weed Sci,
54: 509-515.
29. Gustafson T, S. Knezevic, T. Hunt and J.Lindquist. 2006. Simulated
insect defoliation
and duration of weed interference affected soybean growth. Weed Sci, 54:735-742.
30. Hock S., S.Knezevic, B.Johnson, C.Srague and A. Martin. 2007. WeedSOFT:
Effects
of Corn Row Spacing for Predicting Herbicide Efficacy on Selected Weed
Species. Weed Tech. In print
Book
Chapter:
Lindquist L. J. and S. Z. Knezevic. 1999. Quantifying crop yield response
to weed population: Applications and Limitations in Biotic Stress and
Yield Loss, edited by Robert K. D. Peterson and Leon Hidley . The book
will be published by CRC Press with an expected release date January,
2000.
Best
Extension Publication. Guide for Weed Management in Nebraska. American
Society of Agronomy. 2006.
Best paper (2nd place) published in the 1999-2000 issues of the Weed Science
Journal 47:454-461. WSSA. 2001.
Outstanding Young Scientist in Crop Protection, Amer. Society of Agronomy,
2000.
Layman Research Award, Institute of Agriculture and Natural Resources,
University of Nebraska, Lincoln. 2000.
Outstanding oral presentation, Graduate Student Paper Contest, NCWSS,
St. Louis, Missouri, 1996.
Outstanding poster presented, Graduate Student Paper Contest, NCWSS, St.
Louis, Missouri, 1996.
Nominated for Weed Science Society of America Outstanding Graduate Student
Award, 1996.
Outstanding oral presentation, Annual Interdisciplinary Forum of Agriculture
and Biological Sciences,
Graduate Council of Kansas State University. Manhattan, KS, 1996.
Graduate Scholarship by Neal and Florence E. Morehouse Foundation, KS,
1996.
Outstanding poster presented, Graduate Student Paper Contest, NCWSS, Omaha,
Nebraska, 1995.
Awarded WSWS Educational Enhancement Program with Monsanto Industry in
Arizona & California, 1995.
Outstanding oral presentation, 19th National Grain Sorghum Conference,
Lubbock, TX, 1995.
ICI Chipman and Dow - Elanco Travel Award, 1993.
PROFESSIONAL
ACTIVITES
Memberships:
Weed
Science Society of America (WSSA)
North
Central Weed Science Society (NCWSS)
International
Weed Science Society (IWSS)
Sigma
Xi Scientific Society of Professional Researchers
Chair: Weed Biology and Ecology section, North Central Weed Science
Society Meeting, Kansas City, 2000.
Vice-Chair:
Weed Biology and Ecology section, North Central Weed Science Society
Meeting, Columbus, 1999.
Reviewer
: Weed Science, Weed Technology and Agronomy Journals
Any
questions or comments on this page, contact
Mary Jarvi, Webmaster
|
