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Canavalia And Dolichos Extracts For Sustainable Pest Biocontrol And Plant Nutrition Improvement In El Salvador, Carlos Martinez 2019 University of Nebraska - Lincoln

Canavalia And Dolichos Extracts For Sustainable Pest Biocontrol And Plant Nutrition Improvement In El Salvador, Carlos Martinez

Theses, Dissertations, and Student Research in Agronomy and Horticulture

Botanical repellents and pesticides are now being rediscovered as new tools for integrated pest management in order to reduce the use of toxic chemicals in crop production. Canavalia gladiata and Dolichos lablab are two Fabaceae very well adapted to farmlands of El Salvador, effective as living barriers and mostly as cover crops, however, they are not yet very well disseminated. This document describes the potential for using the liquid extracts and the dry flour of raw seeds of those plants for economic benefit and practical convenience for pest management in Salvadorian agriculture under field conditions. Seed extracts were useful when ...


Parameter Estimation Within An Sir Model Of Chestnut Blight In North America, Anita Davelos Baines, Hope B. Anderson, John S. McAlister, Robert F. Allen 2019 University of Wisconsin-La Crosse

Parameter Estimation Within An Sir Model Of Chestnut Blight In North America, Anita Davelos Baines, Hope B. Anderson, John S. Mcalister, Robert F. Allen

Annual Symposium on Biomathematics and Ecology: Education and Research

No abstract provided.


Modeling And Analysis Of American Chestnut Blight In North America, Robert F. Allen, Anita D. Baines, Hope B. Anderson, John S. McAlister, Tatum D. Rask, Maia Richards-Dinger 2019 University of Wisconsin - La Crosse

Modeling And Analysis Of American Chestnut Blight In North America, Robert F. Allen, Anita D. Baines, Hope B. Anderson, John S. Mcalister, Tatum D. Rask, Maia Richards-Dinger

Annual Symposium on Biomathematics and Ecology: Education and Research

No abstract provided.


Beyond The Binary (Part 1): Re-Envisioning The Complexity Of Life History Evolution In The Bromeliaceae With Comparative Data, Rachel Jabaily, Erin Bodine 2019 Rhodes College

Beyond The Binary (Part 1): Re-Envisioning The Complexity Of Life History Evolution In The Bromeliaceae With Comparative Data, Rachel Jabaily, Erin Bodine

Annual Symposium on Biomathematics and Ecology: Education and Research

No abstract provided.


Quantifying Pollen Traits To Build A Mathematical Model Of Pollen Competition - A Mathematician's Perspective, Montana Ferita, Julie Fucarino, Alex Capaldi, Charlotte Beckford 2019 Westminster College

Quantifying Pollen Traits To Build A Mathematical Model Of Pollen Competition - A Mathematician's Perspective, Montana Ferita, Julie Fucarino, Alex Capaldi, Charlotte Beckford

Annual Symposium on Biomathematics and Ecology: Education and Research

No abstract provided.


Quantifying Pollen Traits To Build A Mathematical Model Of Pollen Competition - A Biologist's Perspective, Rob Swanson, Alex Capaldi 2019 Valparaiso University

Quantifying Pollen Traits To Build A Mathematical Model Of Pollen Competition - A Biologist's Perspective, Rob Swanson, Alex Capaldi

Annual Symposium on Biomathematics and Ecology: Education and Research

No abstract provided.


Sir Modeling Of American Chestnut Blight, Tatum Rask 2019 Illinois State University

Sir Modeling Of American Chestnut Blight, Tatum Rask

Annual Symposium on Biomathematics and Ecology: Education and Research

No abstract provided.


Tropical Tree Species Traits Drive Soil Cation Dynamics Via Effects On Ph: A Proposed Conceptual Framework, Ann E. Russell, Steven J. Hall, James W. Raich 2019 Iowa State University

Tropical Tree Species Traits Drive Soil Cation Dynamics Via Effects On Ph: A Proposed Conceptual Framework, Ann E. Russell, Steven J. Hall, James W. Raich

Ann E. Russell

Humid tropical forests are major players in the global carbon cycle, despite evidence that cations (rock‐derived, positively charged ions) can limit or co‐limit net primary productivity (NPP). In mature forests, tight cation cycling, i.e., without leaching losses, could maintain cation stocks on site. That mechanism does not explain how regenerating tropical secondary forest trees start from seeds and accrue large cation stocks in biomass, when growing on soils depleted in available cations. We propose a new mechanism that links tree species’ traits to soil cation availability via impacts on soil pH, a master biogeochemical driver. We tested ...


Effects Of Harvest Time On The Aroma Of White Wines Made From Cold-Hardy Brianna And Frontenac Gris Grapes Using Headspace Solid-Phase Microextraction And Gas Chromatography-Mass Spectrometry-Olfactometry, Somchai Rice, Madina Tursumbayeva, Matthew Clark, David Greenlee, Murlidhar Dharmadhikari, Anne Fennell, Jacek A. Koziel 2019 Iowa State University

Effects Of Harvest Time On The Aroma Of White Wines Made From Cold-Hardy Brianna And Frontenac Gris Grapes Using Headspace Solid-Phase Microextraction And Gas Chromatography-Mass Spectrometry-Olfactometry, Somchai Rice, Madina Tursumbayeva, Matthew Clark, David Greenlee, Murlidhar Dharmadhikari, Anne Fennell, Jacek A. Koziel

Somchai Rice

The Midwest wine industry has shown a marked increase in growers, hectares planted, wineries, and wine production. This growth coincides with the release of cold-hardy cultivars such as Brianna and Frontenac gris, in 2001 and 2003, respectively. These white grape varieties account for one-third of the total area grown in the state of Iowa. It is generally accepted that the wine aroma profile plays a crucial role in developing a local, sustainable brand. However, the identity of Brianna/Frontenac Gris-based wine aromas and their link to the grape berry chemistry at harvest is unknown. This study aims to preliminarily characterize ...


Phototrophic N2 And Co2 Fixation Using A Rhodopseudomonas Palustris-H2 Mediated Electrochemical System With Infrared Photons, Mathangi Soundararajan, Rhesa Ledbetter, Paul Kusuma, Shuyang Zhen, Paul Ludden, Bruce Bugbee, Scott A. Ensign, Lance C. Seefeldt 2019 Utah State University

Phototrophic N2 And Co2 Fixation Using A Rhodopseudomonas Palustris-H2 Mediated Electrochemical System With Infrared Photons, Mathangi Soundararajan, Rhesa Ledbetter, Paul Kusuma, Shuyang Zhen, Paul Ludden, Bruce Bugbee, Scott A. Ensign, Lance C. Seefeldt

Bruce Bugbee

A promising approach for the synthesis of high value reduced compounds is to couple bacteria to the cathode of an electrochemical cell, with delivery of electrons from the electrode driving reductive biosynthesis in the bacteria. Such systems have been used to reduce CO2 to acetate and other C-based compounds. Here, we report an electrosynthetic system that couples a diazotrophic, photoautotrophic bacterium, Rhodopseudomonas palustris TIE-1, to the cathode of an electrochemical cell through the mediator H2 that allows reductive capture of both CO2 and N2 with all of the energy coming from the electrode and infrared (IR) photons. R. palustris TIE-1 ...


Application Of A Formulated Humic Product Can Increase Soybean Yield, Andrew W. Lenssen, Daniel C. Olk, Dana L. Dinnes 2019 Iowa State University

Application Of A Formulated Humic Product Can Increase Soybean Yield, Andrew W. Lenssen, Daniel C. Olk, Dana L. Dinnes

Andrew W. Lenssen

Application of humic products to crops remains controversial. We conducted a field study in Iowa over four environments from 2012 to 2014 examining productivity of soybean [Glycine max (L.) Merr.] receiving foliar application of a humic product at one of four application times based on plant development. Humic product application never influenced soybean height at harvest. Soybean yield increased following application of the humic product in two of four environments, but application timing was not completely consistent between these two environments. In one 2012 environment, humic product application at V2, V6, and R2 resulted in greater yield than the untreated ...


Non-Linear Behavior Of Protein And Tannin In Wine Produced By Cofermentation Of An Interspecific Hybrid (Vitis Spp.) And Vinifera Cultivar, Erin L. Norton, Gavin L. Sacks, Joey N. Talbert 2019 Iowa State University

Non-Linear Behavior Of Protein And Tannin In Wine Produced By Cofermentation Of An Interspecific Hybrid (Vitis Spp.) And Vinifera Cultivar, Erin L. Norton, Gavin L. Sacks, Joey N. Talbert

Food Science and Human Nutrition Publications

Wines produced from red interspecific hybrid grape cultivars (Vitis spp.) typically have lower tannin than wines produced from vinifera cultivars, which can be attributed to the lower concentration of tannins and higher concentration of tannin binding proteins of interspecific cultivars. Tannin in wines produced from hybrid cultivars could potentially be increased by blending hybrids with vinifera. We hypothesized that blending of grapes prior to fermentation (cofermentation) should result in final wine tannin concentrations lower than wine tannin concentrations predicted from the individual components due to protein-tannin binding, but that this effect should be absent from monovarietal wines blended post-fermentation. To ...


Drainage Water Quality Impacts Of Agricultural Management Practices: Effectof Manure Application Timing And Cover Crops, Brian Dougherty, Carl Pederson, Matt Helmers, Michelle Soupir, Dan Andersen, Antonio Mallarino, John Sawyer 2019 Iowa State University

Drainage Water Quality Impacts Of Agricultural Management Practices: Effectof Manure Application Timing And Cover Crops, Brian Dougherty, Carl Pederson, Matt Helmers, Michelle Soupir, Dan Andersen, Antonio Mallarino, John Sawyer

John E. Sawyer

A primary objective of this study is to evaluate the impact of various cropping and nutrient management systems on crop yields and drainage water quality. This progress report only includes the first-year corn grain yield results. Treatment comparisons include the impact of early fall vs. late fall vs. spring application of liquid swine manure, nitrification inhibitor with late fall swine manure application, cereal rye cover crop, and gypsum application. These comparisons will be conducted for multiple years and used to develop appropriate manure and nutrient management practices to minimize water contamination potential and enhance the use of swine manure as ...


Maize Root Distributions Strongly Associated With Water Tables In Iowa, Usa, Virginia A. Nichols, Raziel A. Ordonez, Emily E. Wright, Michael J. Castellano, Matt Liebman, Jerry L. Hatfield, Matt Helmers, Sotirios V. Archontoulis 2019 Iowa State University

Maize Root Distributions Strongly Associated With Water Tables In Iowa, Usa, Virginia A. Nichols, Raziel A. Ordonez, Emily E. Wright, Michael J. Castellano, Matt Liebman, Jerry L. Hatfield, Matt Helmers, Sotirios V. Archontoulis

Michael Castellano

No abstract provided.


Maize Root Distributions Strongly Associated With Water Tables In Iowa, Usa, Virginia A. Nichols, Raziel A. Ordonez, Emily E. Wright, Michael J. Castellano, Matt Liebman, Jerry L. Hatfield, Matt Helmers, Sotirios V. Archontoulis 2019 Iowa State University

Maize Root Distributions Strongly Associated With Water Tables In Iowa, Usa, Virginia A. Nichols, Raziel A. Ordonez, Emily E. Wright, Michael J. Castellano, Matt Liebman, Jerry L. Hatfield, Matt Helmers, Sotirios V. Archontoulis

Matthew J. Helmers

No abstract provided.


Canopy Chamber Measurements Of Carbon Dioxide Fluxes In Corn And Soybean Fields, Zhuangji Wang, Chenyi Luo, Thomas J. Sauer, Matthew J. Helmers, Liukang Xu, Robert Horton 2019 U.S. Department of Agriculture

Canopy Chamber Measurements Of Carbon Dioxide Fluxes In Corn And Soybean Fields, Zhuangji Wang, Chenyi Luo, Thomas J. Sauer, Matthew J. Helmers, Liukang Xu, Robert Horton

Matthew J. Helmers

Crop canopy CO2 exchange rate (CER) includes crop photosynthesis and soil/plant respiration. A portable canopy chamber is effective in determining crop CER values at a relatively small spatial (m2) scale. The objectives of this study were to use a canopy chamber to measure CO2 fluxes in corn (Zea mays L.) and soybean [Glycine max (L.) Merr.]. Chamber measurements were performed for 18 and 15 d in 2013 and 2014, respectively. The canopy chamber measures instantaneous CER fluxes, and daily and daytime cumulative CO2 values were calculated from the instantaneous CER. The chamber CER results were ...


Metnet: Systems Biology Tools For Arabidopsis, Eve Syrkin Wurtele, Ling Li, Dan Berleant, Dianne Cook, Julie A. Dickerson, Jing Ding, Heike Hofmann, Michael Lawrence, Eun-kyung Lee, Jie Li, Wieslawa Mentzen, Leslie Miller, Basil J. Nikolau, NIck Ransom, Yingjun Wang 2019 Iowa State University

Metnet: Systems Biology Tools For Arabidopsis, Eve Syrkin Wurtele, Ling Li, Dan Berleant, Dianne Cook, Julie A. Dickerson, Jing Ding, Heike Hofmann, Michael Lawrence, Eun-Kyung Lee, Jie Li, Wieslawa Mentzen, Leslie Miller, Basil J. Nikolau, Nick Ransom, Yingjun Wang

Eve Wurtele

MetNet (http://metnetdb.org) is an emerging open-source software platform for exploration of disparate experimental data types and regulatory and metabolic networks in the context of Arabidopsis systems biology. The MetNet platform features graph visualization, interactive displays, graph theoretic computations for determining biological distances, a unique multivariate display and statistical analysis tool, graph modeling using the open source statistical analysis language, R, and versatile text mining. The use of these tools is illustrated with data from the bio1 mutant of Arabidopsis.


Recent Advances In Cucurbit Downy Mildew Research And Their Contribution To The Development Of Integrated Protection Of Cucurbits, Aleš Lebeda, Eva Křístková, Božena Sedláková, Mark P. Widrlechner 2019 Palacký University

Recent Advances In Cucurbit Downy Mildew Research And Their Contribution To The Development Of Integrated Protection Of Cucurbits, Aleš Lebeda, Eva Křístková, Božena Sedláková, Mark P. Widrlechner

Mark P. Widrlechner

Knowledge of the recent distribution, host range, virulence, DNA profiles, and resistance to fungicides of Pseudoperonospora cubensis (Berk. & M. A. Curtis) Rostovzev, and sources of host resistance to this pathogen are reviewed (Lebeda and Cohen, 2011; 2012; Cohen et al., 2015). P. cubensis is widely distributed in all continents, with a high capacity to adapt to changing environmental conditions and new regions. Its host-plant range includes more than 60 species and 20 genera of Cucurbitaceae (Lebeda and Schwinn, 1994; Lebeda and Cohen, 2011). P. cubensis exhibits clear host specialization, with shifts in host range and an increasing spectrum of new host species (Lebeda et al., 2011).


Increasing The Efficacy And Integration Of A Biocontrol Tool For Managing Canada Thistle In The Intermountain West, Steve Young 2019 Utah State University

Increasing The Efficacy And Integration Of A Biocontrol Tool For Managing Canada Thistle In The Intermountain West, Steve Young

Funded Research Records

No abstract provided.


Neonicotinoid Seed Treatments Of Soybean Provide Negligible Benefits To Us Farmers, Spyridon Mourtzinis, Christian H. Krupke, Paul D. Esker, Adam J. Varenhorst, Nicholas J. Arneson, Carl A. Bradley, Adam M. Byrne, Martin I. Chilvers, Loren Giesler, Ames Herbert, Yuba R. Kandel, Maciej J. Kazula, Catherine Hunt, Laura E. Lindsey, Sean Malone, Daren S. Mueller, Seth Naeve, Emerson Nafziger, Dominic D. Reisig, William J. Ross, Devon R. Rossman, Sally Taylor, Shawn P. Conley 2019 University of Wisconsin-Madison

Neonicotinoid Seed Treatments Of Soybean Provide Negligible Benefits To Us Farmers, Spyridon Mourtzinis, Christian H. Krupke, Paul D. Esker, Adam J. Varenhorst, Nicholas J. Arneson, Carl A. Bradley, Adam M. Byrne, Martin I. Chilvers, Loren Giesler, Ames Herbert, Yuba R. Kandel, Maciej J. Kazula, Catherine Hunt, Laura E. Lindsey, Sean Malone, Daren S. Mueller, Seth Naeve, Emerson Nafziger, Dominic D. Reisig, William J. Ross, Devon R. Rossman, Sally Taylor, Shawn P. Conley

Papers in Plant Pathology

Neonicotinoids are the most widely used insecticides worldwide and are typically deployed as seed treatments (hereafter NST) in many grain and oilseed crops, including soybeans. However, there is a surprising dearth of information regarding NST effectiveness in increasing soybean seed yield, and most published data suggest weak, or inconsistent yield benefit. The US is the key soybean-producing nation worldwide and this work includes soybean yield data from 194 randomized and replicated field studies conducted specifically to evaluate the effect of NSTs on soybean seed yield at sites within 14 states from 2006 through 2017. Here we show that across the ...


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