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2002

Curriculum and Instruction

Corn

Articles 1 - 14 of 14

Full-Text Articles in Education

Drought-Stressed Corn, Thomas Dorn, Bruce Anderson, Richard J. Rasby Jan 2002

Drought-Stressed Corn, Thomas Dorn, Bruce Anderson, Richard J. Rasby

Historical Materials from University of Nebraska-Lincoln Extension

This NebFact details how to identify drought stress in corn, its effect on potential yield and how to maximize economic return from drought-damaged corn.


Nf425 Resistance Management For European Corn Borer And Bt Transgenic Corn: Refuge Design And Placement, Thomas E. Hunt, G. W. Echtenkamp Jan 2002

Nf425 Resistance Management For European Corn Borer And Bt Transgenic Corn: Refuge Design And Placement, Thomas E. Hunt, G. W. Echtenkamp

Historical Materials from University of Nebraska-Lincoln Extension

Factors to consider when designing resistance management refuges and field refuge designs.


Atrazine And Non-Atrazine Herbicide Comparisons In Conventional Till Corn, Fred Roeth, Alex Martin Jan 2002

Atrazine And Non-Atrazine Herbicide Comparisons In Conventional Till Corn, Fred Roeth, Alex Martin

Historical Materials from University of Nebraska-Lincoln Extension

Sequential herbicide applications (preemergence followed by postemergence) were more consistent in weed control across four environments because the postemergence treatments controlled weed escapes and second flushes. Singular herbicide treatments were less effective in that regard. Several single applications gave good control but not the excellent control of the sequential treatments. Atrazine in the preemergence application failed to control velvetleaf, but provided good control when used postemergence. The non-atrazine herbicides were at least as effective as the atrazine herbicides.


Nf02-504 Atrazine And Non-Atrazine Herbicide Comparisons In No-Till Corn, Fred Roeth, Alex Martin Jan 2002

Nf02-504 Atrazine And Non-Atrazine Herbicide Comparisons In No-Till Corn, Fred Roeth, Alex Martin

Historical Materials from University of Nebraska-Lincoln Extension

Atrazine herbicide has been in an EPA special review since 1994 because of soil surface runoff concerns. Beginning in 1997, we evaluated atrazine and non-atrazine herbicide treatments in conventional tillage corn and no-till corn on university research farms at Clay Center (irrigated) and Lincoln, Nebraska (non-irrigated). The objective was to compare some common atrazine and non-atrazine herbicides in soil-applied and post emergence treatment combinations. Fourteen herbicide treatments were selected to represent commonly used herbicide classes and application timings. This NebFact reports the no-till results.


Nf02-503 Atrazine And Non-Atrazine Herbicide Comparisons In Conventional Till Corn, Fred Roeth, Alex Martin Jan 2002

Nf02-503 Atrazine And Non-Atrazine Herbicide Comparisons In Conventional Till Corn, Fred Roeth, Alex Martin

Historical Materials from University of Nebraska-Lincoln Extension

Atrazine herbicide has been in an EPA special review since 1994 because of surface and groundwater contamination concerns. Beginning in 1997, we evaluated atrazine and non-atrazine herbicides in conventional tillage corn and no-till corn on university research farms at Clay Center and Lincoln, Nebraska. The objective was to compare some common atrazine and non-atrazine herbicides for weed control and crop response. Thirteen herbicides were selected to represent commonly used herbicide classes and treatment timings. This NebFact reports the conventional till results.


Ec02-1883 Corn Disease Profiles, James P. Stack, Loren J. Giesler, John E. Watkins, Robert M. Harveson, Jennifer L. Chaky Jan 2002

Ec02-1883 Corn Disease Profiles, James P. Stack, Loren J. Giesler, John E. Watkins, Robert M. Harveson, Jennifer L. Chaky

Historical Materials from University of Nebraska-Lincoln Extension

This two-page, four-color extension circular covers the many diseases of corn in Nebraska. It list and describes corn diseases such as: anthracnose, common smut, bacterial stalk rot and top rot, holcus spot, Stewart's Wilt, Goss's bacterial wilt and blight, common rust, southern rust, and gray leaf rust.


Ec02-893 Basis Patterns For Selected Sites In Nebraska For Corn, Wheat, Sorghum, And Soybeans, Lynn Lutgen Jan 2002

Ec02-893 Basis Patterns For Selected Sites In Nebraska For Corn, Wheat, Sorghum, And Soybeans, Lynn Lutgen

Historical Materials from University of Nebraska-Lincoln Extension

The following publication contains corn basis patterns for several towns in Nebraska. The basic price information was collected through electronic media. The listing includes towns that are representative of different geographic locations in Nebraska. The amount of data varies among locations. This publication will be updated each year by adding a year's data to each location which will allow the user to observe changes in the basis patterns over time.


Ec02-105 Nebraska Corn Hybrid Tests, 2002, Lenis Alton Nelson, Robert N. Klein, Roger Wesley Elmore, David D. Baltensperger, Charles A. Shapiro, Stevan Z. Knezevic, James Krall Jan 2002

Ec02-105 Nebraska Corn Hybrid Tests, 2002, Lenis Alton Nelson, Robert N. Klein, Roger Wesley Elmore, David D. Baltensperger, Charles A. Shapiro, Stevan Z. Knezevic, James Krall

Historical Materials from University of Nebraska-Lincoln Extension

This circular is a progress report of corn hybrid performance tests conducted by the Agronomy Department and the Northeast, South Central, West Central and Panhandle Research Extension Centers of Nebraska and University of Wyoming at Torrington. Conduct of experiments and publication of results is a joint effort of the Agricultural Research Division and the Cooperative Extension Service. Tests were supported in part by fees paid by hybrid seed corn producers.


Ec02-173 Spotted And Diffuse Knapweed, Neil L. Heckman, Ryan M. Goss, Roch E. Gaussoin, Stevan Z. Knezevic, John L. Lindquist Jan 2002

Ec02-173 Spotted And Diffuse Knapweed, Neil L. Heckman, Ryan M. Goss, Roch E. Gaussoin, Stevan Z. Knezevic, John L. Lindquist

Historical Materials from University of Nebraska-Lincoln Extension

Spotted knapweed (Centaure amaculosa Lam. = C. biebersteinii DC.) and diffuse knapweed (C.diffusa Lam.) are two of Nebraska’s seven noxious weeds. They are also noxious in at least 17 other states. These are closely related species that are well adapted to a variety of habitats including open forests, rangelands and pastures, Conservation Reserve Program lands, roadsides, and ditch banks. Centaurea is a large genus of over 400 species, 32 of which are common weeds of the United States and several of which [e.g., yellowstar thistle, C. solstitalis L, and Russian knapweed, C. repens L. =Acroptilon repens (L.) DC ...


Ec02-172 Plumeless Thistle, Kara L. Hilgenfeld, Alex Martin Jan 2002

Ec02-172 Plumeless Thistle, Kara L. Hilgenfeld, Alex Martin

Historical Materials from University of Nebraska-Lincoln Extension

Plumeless thistle (Carduus acanthoides L.) is one of seven noxious weeds in Nebraska. An introduced invasive broadleaf weed native to Europe and Asia, plumeless thistle currently infests about 65,000 acres in Nebraska. Infestations of plumeless thistle may reduce productivity of pastures and rangeland, where infestations tend to be the largest. Plumeless thistle competes with and suppresses growth of desirable species. Heavy infestations prevent livestock from grazing the area and lighter infestations prevent livestock from eating plants growing near the thistle. Estimates place the annual loss in Nebraska agricultural production due to plumeless thistle at $162,000. Although plumeless thistle ...


Ec02-174 Leafy Spurge, Robert A. Masters, Brady F. Kappler Jan 2002

Ec02-174 Leafy Spurge, Robert A. Masters, Brady F. Kappler

Historical Materials from University of Nebraska-Lincoln Extension

Leafy spurge is an invasive weed that infests over three million acres in the northern Great Plains and the prairie provinces of Canada. It is commonly found in rangelands, pastures, roadsides, rights-of-way, and woodlands. Leafy spurge can reduce rangeland and pasture carrying capacity by as much as 75 percent because it competes with forages and cattle avoid grazing areas infested with this weed. In North Dakota where leafy spurge infests about 900,000 acres, estimates of direct and indirect losses exceed $100 million each year. In Nebraska, the direct loss in forage value attributed to leafy spurge has been estimated ...


Ec02-171 Canada Thistle, Robert G. Wilson Jan 2002

Ec02-171 Canada Thistle, Robert G. Wilson

Historical Materials from University of Nebraska-Lincoln Extension

Canada thistle [Cirsium arvense (L) Scop.] is one of the seven species defined by Nebraska law as a noxious weed. At least 35 other states also have determined by law that Canada thistle poses a threat to the economic, social, and aesthetic well-being of the residents of their state. Canada thistle is probably the most widespread of all the thistle species and many land managers consider it the most difficult thistle to control. In Nebraska, Canada thistle is estimated to infest 460,000 acres.


Ec02-177 Purple Loosestrife, Stevan Z. Knezevic Jan 2002

Ec02-177 Purple Loosestrife, Stevan Z. Knezevic

Historical Materials from University of Nebraska-Lincoln Extension

Purple loosestrife (Lythrum salicaria) is an introduced invasive weed that isover running thousands of acres of wetlands and waterways in the Midwest. Once purple loosestrife invades a wetland, natural habitat is lost and the productivity of native plant and animal communities is severely reduced. These losses in turn interfere with various levels of the ecosystem and area recreational activities such as fishing, boating and hunting, diminishing revenue from tourism and impairing the social and economic well being of local communities. A single control measure cannot provide long-term, sustainable control of this weed. An integrated approach, using a variety of mechanical ...


Ec02-176 Musk Thistle, Fred Roeth, Steven R. Melvin, Irvin L. Schleufer Jan 2002

Ec02-176 Musk Thistle, Fred Roeth, Steven R. Melvin, Irvin L. Schleufer

Historical Materials from University of Nebraska-Lincoln Extension

Musk thistle (Carduus nutans L.) is an introduced invasive broadleaf weed native to Europe, North Africa, and Asia. In these areas it is a minor weed because natural enemies keep its population low. When the plant was introduced into North America, its natural enemies were left behind. Without these natural checks, the thistle is able to thrive and compete with native vegetation.

Musk thistles aggressively invade all lands in Nebraska. Typical cropland weed control methods are very effective against them; however, land with permanent cover (pasture, range, roadway ditches and wasteland) that is not tilled or treated with a herbicide ...