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University of Nebraska-Lincoln Extension: Historical Materials

Atrazine

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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

University of Nebraska-Lincoln Extension: Historical Materials

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.


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

University of Nebraska-Lincoln Extension: Historical Materials

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.


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

University of Nebraska-Lincoln Extension: Historical Materials

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.


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

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

University of Nebraska-Lincoln Extension: Historical Materials

Although not all herbicides were completely effective in this study, various ones performed well, including atrazine and non-atrazine treatments. The atrazine treatments cost less than most other treatments. The sequential application strategy was consistently better than a single application because the postemergence followup treatment controlled the escapes and second flushes. Single treatments were at a disadvantage in that regard; however, several preemergence, non-atrazine herbicide treatments were noteworthy in their performance.


Nf98-362 Chemical Weed Control In Tree Planting Projects: Part I - Pre-Emergence Herbicides, John Duplissis Jan 1998

Nf98-362 Chemical Weed Control In Tree Planting Projects: Part I - Pre-Emergence Herbicides, John Duplissis

University of Nebraska-Lincoln Extension: Historical Materials

This NebFact examines weed control in tree planting projects.


G96-1299 Agricultural Management Practices To Reduce Atrazine In Surface Water, Thomas G. Franti, Fred Roeth, Robert N. Klein, David L. Holshouser, Andrew P. Christiansen, James A. Schild, Gary L. Zoubek Jan 1996

G96-1299 Agricultural Management Practices To Reduce Atrazine In Surface Water, Thomas G. Franti, Fred Roeth, Robert N. Klein, David L. Holshouser, Andrew P. Christiansen, James A. Schild, Gary L. Zoubek

University of Nebraska-Lincoln Extension: Historical Materials

Ways to reduce atrazine availability, reduce the amount of water runoff, and reduce the impact of the first runoff are covered here. Each year growers face many decisions when planning for a new growing season, including selection of an economical weed control program. Because of their ease of use and effectiveness, many producers use preemergence herbicides to control weeds. Because of its low cost, corn and sorghum growers often select atrazine or an atrazine combination. Nebraska corn growers annually apply an estimated 6.3 million pounds of atrazine. Atrazine is an effective and low-cost herbicide, but there is a hidden cost …


Nf93-120 The 1993 Atrazine Label Revision, Fred W. Roeth Jan 1993

Nf93-120 The 1993 Atrazine Label Revision, Fred W. Roeth

University of Nebraska-Lincoln Extension: Historical Materials

This NebFact discusses the 1993 label revision of Atrazine.


G93-1158 Questions And Answers About Atrazine, Fred Roeth, S.D. Comfort Jan 1993

G93-1158 Questions And Answers About Atrazine, Fred Roeth, S.D. Comfort

University of Nebraska-Lincoln Extension: Historical Materials

This NebGuide addresses some of the current concerns about atrazine and water quality. Included are some questions and answers about atrazine regarding toxicity, EPA guidelines, presence in water supplies, weed resistance and best management practices. What is atrazine? Atrazine is a herbicide that selectively controls broadleaf (dicot) weeds, such as pigweed, cocklebur, velvetleaf and certain grass weeds in fields of corn and sorghum. Selective control means that the target weeds are controlled, with little or no injury to the crop. Atrazine is well tolerated by actively growing corn and sorghum, which absorb and metabolize the herbicide and thereby detoxify it.