@article{cahoon_jordan_tranel_york_riggins_seagroves_inman_everman_leon_2024, title={Influence of gender and glyphosate resistance on Palmer amaranth growth and interference with cotton}, volume={10}, ISSN={["2374-3832"]}, url={https://doi.org/10.1002/cft2.20272}, DOI={10.1002/cft2.20272}, abstractNote={Abstract Management of herbicide‐resistant weeds can be improved by understanding the biology of resistant biotypes. While the majority of research has focused on female plants and seed production of Palmer amaranth ( Amaranthus palmeri S. Watson) that are resistant to glyphosate, growth of male plants that are resistant to this herbicide has not been studied in detail. Additionally, interference of male versus female Palmer amaranth plants on cotton ( Gossypium hirsutum ) yield has not been reported. Plant height and biomass of male and female plants from a mixed population of glyphosate‐resistant (GR) and glyphosate‐susceptible (GS) plants was studied in North Carolina when grown season‐long with cotton. Palmer amaranth height was less for GR male plants compared with GS males and both GR and GS females. Biomass of Palmer amaranth female plants was twice that of male plants irrespective of glyphosate resistance. Cotton yield was affected similarly by Palmer amaranth regardless of either gender or glyphosate resistance status. The implications of shorter GR male plants on pollen dispersal and ramifications on management of glyphosate resistance are not known. Results from these trials did not address implications of the height of male plants on fitness of GR resistance. Nonetheless, the finding that GR male plants were shorter in the field than GS male plants warrants a new look at this topic. Similar reductions for cotton yield in presence of both GR and GS biotypes and genders suggest that current yield loss assessments and management decisions do not need to consider these variables in Palmer amaranth populations.}, number={1}, journal={CROP FORAGE & TURFGRASS MANAGEMENT}, author={Cahoon, Charles W. and Jordan, David L. and Tranel, Patrick J. and York, Alan C. and Riggins, Chance and Seagroves, Richard and Inman, Matthew and Everman, Wesley and Leon, Ramon}, year={2024}, month={Jun} } @article{oreja_inman_jordan_vann_jennings_leon_2022, title={Effect of cotton herbicide programs on weed population trajectories and frequency of glyphosate-resistant Palmer amaranth (Amaranthus palmeri)}, volume={7}, ISSN={["1550-2759"]}, url={https://doi.org/10.1017/wsc.2022.41}, DOI={10.1017/wsc.2022.41}, abstractNote={Abstract}, journal={WEED SCIENCE}, publisher={Cambridge University Press (CUP)}, author={Oreja, Fernando H. and Inman, Matthew D. and Jordan, David L. and Vann, Matthew and Jennings, Katherine M. and Leon, Ramon G.}, year={2022}, month={Jul} } @article{clapp_vann_cahoon_jordan_fisher_inman_2022, title={Evaluations of S-Metolachlor in flue-cured tobacco weed management programs}, volume={2}, ISSN={["1435-0645"]}, url={https://doi.org/10.1002/agj2.20984}, DOI={10.1002/agj2.20984}, abstractNote={Abstract}, journal={AGRONOMY JOURNAL}, author={Clapp, Andrew M. and Vann, Matthew C. and Cahoon, Charles W. and Jordan, David L. and Fisher, Loren R. and Inman, Matt D.}, year={2022}, month={Feb} } @article{cahoon_jordan_tranel_york_riggins_seagroves_inman_everman_leon_2022, title={In-field assessment of EPSPS amplification on fitness cost in mixed glyphosate-resistant and glyphosate-sensitive populations of Palmer amaranth (Amaranthus palmeri)}, volume={10}, ISSN={["1550-2759"]}, url={https://doi.org/10.1017/wsc.2022.60}, DOI={10.1017/wsc.2022.60}, abstractNote={Abstract}, journal={WEED SCIENCE}, author={Cahoon, Charles W. and Jordan, David L. and Tranel, Patrick J. and York, Alan C. and Riggins, Chance and Seagroves, Richard and Inman, Matthew and Everman, Wesley and Leon, Ramon}, year={2022}, month={Oct} } @article{oreja_inman_jordan_bardhan_leon_2022, title={Modeling weed community diversity based on species population density dynamics and herbicide use intensity}, volume={138}, ISSN={["1873-7331"]}, DOI={10.1016/j.eja.2022.126533}, abstractNote={Herbicide programs change weed population density as well as weed community composition. The repeated use of a given program can result in a weed community that progressively becomes more difficult to manage or could lose its ability to provide ecosystem services. Simulation of those changes using stochastic models considering population dynamics of multiple species makes it possible to identify a priori potential community changes that might result from the use of a given herbicide program. The objectives of this work were to model the population dynamics of weed species under different herbicide programs and how those dynamics change weed community diversity over time. Weed population dynamics were stochastically modeled along ten years using population growth rate (lambda) for each species under different herbicide programs. Lambda values were obtained from an eight-year long, field experiment, and these were used to parameterize the stochastic ranges for the model for each weed species. Population trajectories were modeled for each individual species over ten years and the results were used to estimate richness, diversity, and evenness for each herbicide use scenario. The repeated use of glyphosate alone had a minimal effect on richness, but it caused a strong reduction in weed diversity and evenness. Programs with more mechanisms of action and the use of both preemergence and postemergence herbicides were slightly more likely to suffer the loss of weed species than programs with single or just a few herbicides. Conversely, the former had a higher probability of maintaining weed diversity and evenness than the latter. According to simulations, losses in weed community diversity are reversible, especially when highly competitive species were eradicated allowing other species with lower lambda to increase their populations. However, the eradication of species with low reproductive rates reduced diversity and evenness. The effects of herbicide programs on the weed community lasted for several years even after those programs were modified indicating that seed banks play a major buffering role in the rate of change of weed community composition. Thus, frequent changes in management interrupting the repeated use of specific weed control programs, even under high herbicide intensity use (i.e., number of applications and mechanisms of action), can help maintain weed diversity in agroecosystems.}, journal={EUROPEAN JOURNAL OF AGRONOMY}, author={Oreja, Fernando H. and Inman, Matthew D. and Jordan, David L. and Bardhan, Deepayan and Leon, Ramon G.}, year={2022}, month={Aug} } @article{inman_vann_fisher_gannon_jordan_jennings_2021, title={Evaluation of dicamba retention in spray tanks and its impact on flue-cured tobacco}, volume={35}, ISSN={["1550-2740"]}, url={http://dx.doi.org/10.1017/wet.2020.73}, DOI={10.1017/wet.2020.73}, abstractNote={Abstract}, number={1}, journal={WEED TECHNOLOGY}, publisher={Cambridge University Press (CUP)}, author={Inman, Matthew D. and Vann, Matthew C. and Fisher, Loren R. and Gannon, Travis W. and Jordan, David L. and Jennings, Katie M.}, year={2021}, month={Feb}, pages={35–42} } @article{vann_inman_fisher_2021, title={Flue-cured tobacco holding-ability is affected by harvest timing}, volume={11}, ISSN={["2374-3832"]}, url={https://doi.org/10.1002/cft2.20137}, DOI={10.1002/cft2.20137}, abstractNote={Abstract}, journal={CROP FORAGE & TURFGRASS MANAGEMENT}, publisher={Wiley}, author={Vann, Matthew C. and Inman, Matthew D. and Fisher, Loren R.}, year={2021}, month={Nov} } @article{oreja_inman_jordan_leon_2021, title={Population growth rates of weed species in response to herbicide programme intensity and their impact on weed community}, volume={9}, ISSN={["1365-3180"]}, url={https://doi.org/10.1111/wre.12509}, DOI={10.1111/wre.12509}, abstractNote={Abstract}, journal={WEED RESEARCH}, publisher={Wiley}, author={Oreja, Fernando H. and Inman, Matthew D. and Jordan, David L. and Leon, Ramon G.}, year={2021}, month={Sep} } @article{hare_jordan_leon_edmisten_post_cahoon_everman_mahoney_inman_2020, title={Influence of timing and intensity of weed management on crop yield and contribution to weed emergence in cotton the following year}, volume={6}, ISSN={["2374-3832"]}, url={https://doi.org/10.1002/cft2.20021}, DOI={10.1002/cft2.20021}, abstractNote={Abstract}, number={1}, journal={CROP FORAGE & TURFGRASS MANAGEMENT}, publisher={Wiley}, author={Hare, Andrew T. and Jordan, David L. and Leon, Ramon G. and Edmisten, Keith L. and Post, Angela R. and Cahoon, Charles W. and Everman, Wesley J. and Mahoney, Denis J. and Inman, Matthew D.}, year={2020} } @article{chaudhari_jordan_york_jennings_cahoon_chandi_inman_2017, title={Biology and management of Glyphosate-resistant and Glyphosate-susceptible Palmer Amaranth (&ITAmaranthus&IT &ITpalmeri&IT) phenotypes from a segregating population}, volume={65}, number={6}, journal={Weed Science}, author={Chaudhari, S. and Jordan, D. L. and York, A. C. and Jennings, K. M. and Cahoon, C. W. and Chandi, A. and Inman, M. D.}, year={2017}, pages={755–768} } @article{inman_jordan_york_jennings_monks_everman_bollman_fowler_cole_soteres_et al._2016, title={Long-Term Management of Palmer Amaranth (Amaranthus palmeri) in Dicamba-Tolerant Cotton}, volume={64}, ISSN={["1550-2759"]}, DOI={10.1614/ws-d-15-00058.1}, abstractNote={Research was conducted from 2011 to 2014 to determine weed population dynamics and frequency of glyphosate-resistant (GR) Palmer amaranth with herbicide programs consisting of glyphosate, dicamba, and residual herbicides in dicamba-tolerant cotton. Five treatments were maintained in the same plots over the duration of the experiment: three sequential POST applications of glyphosate with or without pendimethalin plus diuron PRE; three sequential POST applications of glyphosate plus dicamba with and without the PRE herbicides; and a POST application of glyphosate plus dicamba plus acetochlor followed by one or two POST applications of glyphosate plus dicamba without PRE herbicides. Additional treatments included alternating years with three sequential POST applications of glyphosate only and glyphosate plus dicamba POST with and without PRE herbicides. The greatest population of Palmer amaranth was observed when glyphosate was the only POST herbicide throughout the experiment. Although diuron plus pendimethalin PRE in a program with only glyphosate POST improved control during the first 2 yr, these herbicides were ineffective by the final 2 yr on the basis of weed counts from soil cores. The lowest population of Palmer amaranth was observed when glyphosate plus dicamba were applied regardless of PRE herbicides or inclusion of acetochlor POST. Frequency of GR Palmer amaranth was 8% or less when the experiment was initiated. Frequency of GR Palmer amaranth varied by herbicide program during 2012 but was similar among all herbicide programs in 2013 and 2014. Similar frequency of GR Palmer amaranth across all treatments at the end of the experiment most likely resulted from pollen movement from Palmer amaranth treated with glyphosate only to any surviving female plants regardless of PRE or POST treatment. These data suggest that GR Palmer amaranth can be controlled by dicamba and that dicamba is an effective alternative mode of action to glyphosate in fields where GR Palmer amaranth exists.}, number={1}, journal={WEED SCIENCE}, author={Inman, M. D. and Jordan, D. L. and York, A. C. and Jennings, Katherine and Monks, D. W. and Everman, W. J. and Bollman, S. L. and Fowler, J. T. and Cole, R. M. and Soteres, J. K. and et al.}, year={2016}, pages={161–169} }