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Evaluation of Rapid Screening Techniques for Woody Plant Herbicide Development

Published online by Cambridge University Press:  20 January 2017

Mitchell P. Blair ,
Shepard M. Zedaker ,
John R. Seiler ,
Perry L. Hipkins  and
Patrick L. Burch
Mitchell P. Blair*
Affiliation:
Department of Plant and Soil Sciences, University of Kentucky, Lexington, KY 40546
Shepard M. Zedaker
Affiliation:
Department of Forestry, Department of Plant Pathology and Weed Science, Virginia Polytechnic Institute and State University, Blacksburg, VA, 24061
John R. Seiler
Affiliation:
Department of Forestry, Department of Plant Pathology and Weed Science, Virginia Polytechnic Institute and State University, Blacksburg, VA, 24061
Perry L. Hipkins
Affiliation:
Department of Forestry, Department of Plant Pathology and Weed Science, Virginia Polytechnic Institute and State University, Blacksburg, VA, 24061
Patrick L. Burch
Affiliation:
Dow AgroSciences, LLC, Christiansburg, VA 24073
*
Corresponding author's E-mail: [email protected].
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Abstract

Woody plant herbicide screening techniques were evaluated to expedite the screening process and decrease amounts of herbicide active ingredient required. Rapid greenhouse screening of woody plant seedlings was performed in less than 6 months, and rapid seed screening was performed in less than 20 days. A traditional field screen, requiring 10 months from application to final evaluation, was performed for comparison and regression modeling purposes. Imazapyr and triclopyr were used as test chemicals and linear regressions were generated to predict traditional field screen results from rapid screens. Significant regressions were produced that predicted field responses of loblolly pine, sweetgum, and yellow-poplar with the use of both herbicides and either rapid screening technique. This indicated that rapid screening techniques could determine herbicide efficacy and/or species spectrum in much less time with significantly less herbicide. Rapid greenhouse screens of triclopyr produced more statistically significant regressions than those using imazapyr. Rapid seed screens could estimate species spectrum within 5 days after treatment. These results indicate that rapid greenhouse screen and rapid seed screen techniques can provide woody plant herbicide developers initial efficacy and spectrum of control data in a cost- and-time effective manner.

Keywords

imazapyrtriclopyrgreen ash, Fraxinus pennsylvanica Marshloblolly pine, Pinus taeda L.sweetgum, Liquidambar styraciflua L. #3 LIQSTyellow-poplar, Liriodendron tulipfera L. # LIRTURapid greenhouse screenrapid seed screenALS, acetolactate synthase (EC 4.1.3.18)DAT, days after treatmentWAT, weeks after treatmentYAT, year after treatment% C Ht, percent control of height% Nec, percent leaf necrosis% Mort, percent mortalityP, P value for test of significanceR2, coefficient of determinationCV, coefficient of variationµE/m2/s, microEinstein per square meter per second
Type
Research
Information
Weed Technology , Volume 20 , Issue 4 , December 2006 , pp. 971 - 979
Copyright
Copyright © Weed Science Society of America 

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References

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