Search

Your search keyword '"Stewart, Scott D."' showing total 174 results
Start Over Author "Stewart, Scott D."
174 results on '"Stewart, Scott D."'

1. Soybean Invertebrate Loss Estimates from the United States — 2021

Author

Sisson, Adam, primary, Musser, Fred, additional, Catchot, Angus L., additional, Davis, Jeff A., additional, DiFonzo, Chris, additional, Graham, Scott H., additional, Greene, Jeremy K., additional, Jensen, Bryan, additional, Kerns, David L., additional, Koch, Robert L., additional, Owens, David, additional, Reisig, Dominic D., additional, Roberts, Phillip, additional, Royer, Tom, additional, Seiter, Nicholas J., additional, Stewart, Scott D., additional, Taylor, Sally, additional, Thrash, Benjamin, additional, Tilmon, Kelly, additional, and Villanueva, Raul T., additional

Published
2023
Full Text
View/download PDF

6. The Spatiotemporal Distribution, Abundance, and Seasonal Dynamics of Cotton-Infesting Aphids in the Southern U.S.

Author

Mahas, John W., primary, Mahas, Jessica B., additional, Ray, Charles, additional, Kesheimer, Adam, additional, Steury, Todd D., additional, Conzemius, Sophia R., additional, Crow, Whitney, additional, Gore, Jeffrey, additional, Greene, Jeremy K., additional, Kennedy, George G., additional, Kerns, David, additional, Malone, Sean, additional, Paula-Moraes, Silvana, additional, Roberts, Phillip, additional, Stewart, Scott D., additional, Taylor, Sally, additional, Toews, Michael, additional, and Jacobson, Alana L., additional

Published
2023
Full Text
View/download PDF

7. Evaluating Efficacy and Chemical Concentrations of Commonly Used Insecticides Targeting Tarnished Plant Bug in Mid-South Cotton

Author

Smith, Jacob, primary, Crow, Whitney D., additional, Catchot, Angus L., additional, Gore, Jeff, additional, Cook, Don R., additional, Musser, Fred, additional, Stewart, Scott D., additional, Brown, Sebe, additional, Thrash, Ben, additional, Lorenz, Gus, additional, Bateman, Nick, additional, Studebaker, Glenn, additional, Towles, Tyler, additional, and Kerns, David, additional

Published
2023
Full Text
View/download PDF

8. The Spatiotemporal Distribution, Abundance, and Seasonal Dynamics of Cotton-Infesting Aphids in the Southern U.S.

Author

Mahas, John W., Mahas, Jessica B., Ray, Charles, Kesheimer, Adam, Steury, Todd D., Conzemius, Sophia R., Crow, Whitney, Gore, Jeffrey, Greene, Jeremy K., Kennedy, George G., Kerns, David, Malone, Sean, Paula-Moraes, Silvana, Roberts, Phillip, Stewart, Scott D., Taylor, Sally, Toews, Michael, Jacobson, Alana L., Mahas, John W., Mahas, Jessica B., Ray, Charles, Kesheimer, Adam, Steury, Todd D., Conzemius, Sophia R., Crow, Whitney, Gore, Jeffrey, Greene, Jeremy K., Kennedy, George G., Kerns, David, Malone, Sean, Paula-Moraes, Silvana, Roberts, Phillip, Stewart, Scott D., Taylor, Sally, Toews, Michael, and Jacobson, Alana L.

Abstract

Cotton leafroll dwarf virus (CLRDV) is an emerging aphid-borne pathogen infecting cotton, Gossypium hirsutum L., in the southern United States (U.S.). The cotton aphid, Aphis gossypii Glover, infests cotton annually and is the only known vector to transmit CLRDV to cotton. Seven other species have been reported to feed on, but not often infest, cotton: Protaphis middletonii Thomas, Aphis craccivora Koch, Aphis fabae Scopoli, Macrosiphum euphorbiae Thomas, Myzus persicae Sulzer, Rhopalosiphum rufiabdominale Sasaki, and Smynthurodes betae Westwood. These seven have not been studied in cotton, but due to their potential epidemiological importance, an understanding of the intra- and inter-annual variations of these species is needed. In 2020 and 2021, aphids were monitored from North Carolina to Texas using pan traps around cotton fields. All of the species known to infest cotton, excluding A. fabae, were detected in this study. Protaphis middletonii and A. gossypii were the most abundant species identified. The five other species of aphids captured were consistently low throughout the study and, with the exception of R. rufiabdominale, were not detected at all locations. The abundance, distribution, and seasonal dynamics of cotton-infesting aphids across the southern U.S. are discussed.

Published
2023

14. Standardized Field Trials in Cotton and Bioassays to Evaluate Resistance of Tobacco Thrips (Thysanoptera: Thripidae) to Insecticides in the Southern United States

Author

Krob, Jessica L, primary, Stewart, Scott D, additional, Brown, Sebe A, additional, Kerns, Dawson, additional, Graham, Scott H, additional, Perkins, Clay, additional, Huseth, Anders S, additional, Kennedy, George G, additional, Reisig, Dominic D, additional, Taylor, Sally V, additional, Towles, Tyler B, additional, Kerns, David L, additional, Thrash, Benjamin C, additional, Lorenz, Gus M, additional, Bateman, Nick R, additional, Cook, Don R, additional, Crow, Whitney D, additional, Gore, Jeffrey, additional, Catchot, Angus L, additional, Musser, Fred R, additional, and Catchot, Beverly, additional

Published
2022
Full Text
View/download PDF

16. Pest population dynamics are related to a continental overwintering gradient

Author

Lawton, Douglas, primary, Huseth, Anders S., additional, Kennedy, George G., additional, Morey, Amy C., additional, Hutchison, William D., additional, Reisig, Dominic D., additional, Dorman, Seth J., additional, Dillard, DeShae, additional, Venette, Robert C., additional, Groves, Russell L., additional, Adamczyk, John J., additional, Barbosa Dos Santos, Izailda, additional, Baute, Tracey, additional, Brown, Sebe, additional, Burkness, Eric, additional, Dean, Ashley, additional, Dively, Galen P., additional, Doughty, Hélène B., additional, Fleischer, Shelby J., additional, Green, Jessica, additional, Greene, Jeremy K., additional, Hamilton, Krista, additional, Hodgson, Erin, additional, Hunt, Thomas, additional, Kerns, David, additional, Leonard, Billy Rogers, additional, Malone, Sean, additional, Musser, Fred, additional, Owens, David, additional, Palumbo, John C., additional, Paula-Moraes, Silvana, additional, Peterson, Julie A., additional, Ramirez, Ricardo, additional, Rondon, Silvia I., additional, Schilder, Tracy L., additional, Seaman, Abby, additional, Spears, Lori, additional, Stewart, Scott D., additional, Taylor, Sally, additional, Towles, Tyler, additional, Welty, Celeste, additional, Whalen, Joanne, additional, Wright, Robert, additional, and Zuefle, Marion, additional

Published
2022
Full Text
View/download PDF

17. Standardized Field Trials in Cotton and Bioassays to Evaluate Resistance of Tobacco Thrips (Thysanoptera: Thripidae) to Insecticides in the Southern United States

Author

Krob, Jessica L., Stewart, Scott D., Brown, Sebe A., Kerns, Dawson, Graham, Scott H., Perkins, Clay, Huseth, Anders S., Kennedy, George G., Reisig, Dominic D., Taylor, Sally V., Towles, Tyler B., Kerns, David L., Thrash, Benjamin C., Lorenz, Gus M., Bateman, Nick R., Cook, Don R., Crow, Whitney D., Gore, Jeffrey, Catchot, Angus L., Musser, Fred R., Catchot, Beverly, Krob, Jessica L., Stewart, Scott D., Brown, Sebe A., Kerns, Dawson, Graham, Scott H., Perkins, Clay, Huseth, Anders S., Kennedy, George G., Reisig, Dominic D., Taylor, Sally V., Towles, Tyler B., Kerns, David L., Thrash, Benjamin C., Lorenz, Gus M., Bateman, Nick R., Cook, Don R., Crow, Whitney D., Gore, Jeffrey, Catchot, Angus L., Musser, Fred R., and Catchot, Beverly

Abstract

Foliar-applied insecticide treatments may be necessary to manage thrips in cotton (Gossypium hirsutum L.) under severe infestations or when at-planting insecticide seed treatments do not provide satisfactory protection. The most common foliar-applied insecticide is acephate. Field observations in Tennessee suggest that the performance of acephate has declined. Thus, the first objective was to perform leaf-dip bioassays to assess if tobacco thrips, Frankliniella fusca (Hinds) (Thysanoptera: Thripidae), in cotton production regions have evolved resistance to foliar-applied insecticides. A second objective was to assess the performance of commonly applied foliar insecticides for managing thrips in standardized field trials in Arkansas, Tennessee, Mississippi, and Texas. For both objectives, several insecticides were evaluated including acephate, dicrotophos, dimethoate, lambda-cyhalothrin, imidacloprid, and spinetoram. Field trials and bioassays were completed from 2018 to 2021. Dose-response bioassays with acephate were performed on tobacco thrips field populations and a susceptible laboratory population. Bioassay results suggest that tobacco thrips have developed resistance to acephate and other organophosphate insecticides; however, this resistance seems to be most severe in Arkansas, Tennessee, and the Delta region of Mississippi. Resistance to other classes of insecticides were perhaps even more evident in these bioassays. The performance of these insecticides in field trials was variable, with tobacco thrips only showing consistent signs of resistance to lambda-cyhalothrin. However, it is evident that many populations of tobacco thrips are resistant to multiple classes of insecticides. Further research is needed to determine heritability and resistance mechanism(s).

Published
2022

20. Development of Economic Thresholds Toward Bollworm (Lepidoptera: Noctuidae), Management in Bt Cotton, and Assessment of the Benefits From Treating Bt Cotton With Insecticide

Author

Calvin, Wilfrid, primary, Yang, Fei, additional, Brown, Sebe A, additional, Catchot, Angus L, additional, Crow, Whitney D, additional, Cook, Donald R, additional, Gore, Jeffrey, additional, Kurtz, Ryan, additional, Lorenz, Gustav M, additional, Seiter, Nicholas J, additional, Stewart, Scott D, additional, Towles, Tyler, additional, and Kerns, David L, additional

Published
2021
Full Text
View/download PDF

22. First transgenic trait for control of plant bugs and thrips in cotton

Author

Akbar, Waseem, Gowda, Anilkumar, Ahrens, Jeffrey E, Stelzer, Jason W, Brown, Robert S, Bollman, Scott L, Greenplate, John T, Gore, Jeffrey, Catchot, Angus L, Lorenz, Gus, Stewart, Scott D, Kerns, David L, Greene, Jeremy K, Toews, Michael D, Herbert, David A, Reisig, Dominic D, Sword, Gregory A, Ellsworth, Peter C, Godfrey, Larry D, and Clark, Thomas L

Subjects
Nymph, Gossypium, Bacillus thuringiensis Toxins, Cry51Aa2.834_16, Lygus spp, fungi, Thysanoptera, food and beverages, MON 88702, Plants, Genetically Modified, Hemiptera, Endotoxins, Heteroptera, Hemolysin Proteins, Bacterial Proteins, Frankliniella spp, Animals, transgenic cotton, Pest Control, Biological, Research Articles, Research Article
Abstract

BACKGROUND Plant bugs (Lygus spp.) and thrips (Thrips spp.) are two of the most economically important insect pest groups impacting cotton production in the USA today, but are not controlled by current transgenic cotton varieties. Thus, seed or foliar‐applied chemical insecticides are typically required to protect cotton from these pest groups. Currently, these pests are resistant to several insecticides, resulting in fewer options for economically viable management. Previous publications documented the efficacy of transgenic cotton event MON 88702 against plant bugs and thrips in limited laboratory and field studies. Here, we report results from multi‐location and multi‐year field studies demonstrating efficacy provided by MON 88702 against various levels of these pests. RESULTS MON 88702 provided a significant reduction in numbers of Lygus nymphs and subsequent yield advantage. MON 88702 also had fewer thrips and minimal injury. The level of control demonstrated by this transgenic trait was significantly better compared with its non‐transgenic near‐isoline, DP393, receiving insecticides at current commercial rates. CONCLUSION The level of efficacy demonstrated here suggests that MON 88702, when incorporated into existing IPM programs, could become a valuable additional tool for management of Lygus and thrips in cotton agroecosystems experiencing challenges of resistance to existing chemical control strategies. © 2018 The Authors. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.

Published
2018

24. Termination of Insecticide Applications for Tarnished Plant Bug (Hemiptera: Miridae) Management in Cotton

Author

Crow, Whitney, primary, Gore, Jeffrey, additional, Catchot Jr., Angus L., additional, Cook, Donald R., additional, Stewart, Scott D., additional, Seiter, Nick J., additional, Studebaker, Glenn, additional, Lorenz, Gus, additional, Kerns, David L., additional, Brown, Sebe, additional, Jones, Moneen M., additional, Musser, Fred, additional, and Towles, Tyler, additional

Published
2020
Full Text
View/download PDF

27. Evaluation of Bt resistance in Helicoverpa zea (Lepidoptera: Noctuidae) strains using various Bt cotton plant tissues.

Author

Kerns, Dawson D, Yang, Fei, Kerns, David L, and Stewart, Scott D

Subjects
HELIOTHIS zea, PLANT cells & tissues, BT cotton, NOCTUIDAE, LEPIDOPTERA, HELICOVERPA armigera, FALL armyworm
Abstract

BACKGROUND Diet‐overlay bioassays suggest that Helicoverpa zea (Lepidoptera: Noctuidae) field populations have developed resistance to some of the Bt insecticidal proteins that are constituents of the pyramids expressed in the second and third generation Bt cotton technologies. Unfortunately, these bioassays are not always a reliable indicator for how a seemingly resistant population will perform in an actual cotton field, and thus, leaf tissue bioassays have been suggested as a method to better assess field performance. However, bollworm larvae typically prefer to feed on floral tissue rather than leaf tissue, and an alternative cotton structure type may be more ideal for use in plant tissue‐based bioassays. A series of diet‐overlay bioassays using Bt proteins and Bt cotton plant tissue were conducted with laboratory susceptible (Bz‐SS) and resistant (Cry‐RR, resistant to Cry1Ac and Cry2Ab) H. zea strains to determine if plant tissue overlays could detect resistance and which cotton plant structure type would be most ideal for use in bioassays. RESULTS: Results suggest that diet overlays using lyophilized plant tissue were able to detect resistance. Lyophilized tissue from white flowers was most ideal for use in bioassays, whereas tissue from non‐Bt bolls and leaves affected larval health and behavior, confounding assay results. CONCLUSION: Overlays using white flower tissue could potentially be used to supplement Bt protein overlays and provide an improved assessment of larval performance on Bt cotton technologies. © 2021 Society of Chemical Industry. [ABSTRACT FROM AUTHOR]

Published
2022
Full Text
View/download PDF

34. First transgenic trait for control of plant bugs and thrips in cotton

Author

Entomology, Akbar, Waseem, Gowda, Anilkumar, Ahrens, Jeffrey E., Stelzer, Jason W., Brown, Robert S., Bollman, Scott L., Greenplate, John T., Gore, Jeffrey, Catchot, Angus L., Lorenz, Gus, Stewart, Scott D., Kerns, David L., Greene, Jeremy K., Toews, Michael D., Herbert, D. Ames Jr., Reisig, Dominic D., Sword, Gregory A., Ellsworth, Peter C., Godfrey, Larry D., Clark, Thomas L., Entomology, Akbar, Waseem, Gowda, Anilkumar, Ahrens, Jeffrey E., Stelzer, Jason W., Brown, Robert S., Bollman, Scott L., Greenplate, John T., Gore, Jeffrey, Catchot, Angus L., Lorenz, Gus, Stewart, Scott D., Kerns, David L., Greene, Jeremy K., Toews, Michael D., Herbert, D. Ames Jr., Reisig, Dominic D., Sword, Gregory A., Ellsworth, Peter C., Godfrey, Larry D., and Clark, Thomas L.

Abstract

BACKGROUND: Plant bugs (Lygus spp.) and thrips (Thrips spp.) are two of the most economically important insect pest groups impacting cotton production in the USA today, but are not controlled by current transgenic cotton varieties. Thus, seed or foliar-applied chemical insecticides are typically required to protect cotton from these pest groups. Currently, these pests are resistant to several insecticides, resulting in fewer options for economically viable management. Previous publications documented the efficacy of transgenic cotton event MON 88702 against plant bugs and thrips in limited laboratory and field studies. Here, we report results from multi-location and multi-year field studies demonstrating efficacy provided by MON 88702 against various levels of these pests. RESULTS: MON 88702 provided a significant reduction in numbers of Lygus nymphs and subsequent yield advantage. MON 88702 also had fewer thrips and minimal injury. The level of control demonstrated by this transgenic trait was significantly better compared with its non-transgenic near-isoline, DP393, receiving insecticides at current commercial rates. CONCLUSION: The level of efficacy demonstrated here suggests that MON 88702, when incorporated into existing IPM programs, could become a valuable additional tool for management of Lygus and thrips in cotton agroecosystems experiencing challenges of resistance to existing chemical control strategies. © 2018 The Authors. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry. © 2018 The Authors. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.

Published
2018

41. RNA-seq reveals disruption of gene regulation when honey bees are caged and deprived of hive conditions.

Author

Alburaki, Mohamed, Karim, Shahid, Lamour, Kurt, Adamczyk, John, and Stewart, Scott D.

Subjects
HONEYBEES, GENETIC regulation, POLLINATION by bees, WATER consumption, BEES, IMIDACLOPRID, DRINKING (Physiology), BEE colonies
Abstract

In this study, we present phenotypic and genetic data characterizing the impact of imidacloprid and caging stress on honey bee Apis mellifera physiological responses and regulation of 45 genes using targeted-RNA seq. The term 'caging stress' characterizes the effects of depriving honey bees of all hive aspects and conditions. Two cohorts of 1 day old sister bees were subjected to different conditions. One cohort was caged and fed different imidacloprid-tainted sugar solutions and the second was marked and introduced back to its natal hive. Physiological bee parameters and diet behavior were monitored daily for caged bees over several weeks. Bee samples from both cohorts were sampled weekly for RNA sequencing and oxidative stress analyses. Imidacloprid induced significant protein damage and post-ingestive aversion responses in caged bees, leading to lower tainted syrup consumption and higher water intake compared with the controls. No differentially expressed genes were observed among caged bees in regards to imidacloprid treatment. However, significant upregulation in antioxidant genes was recorded in caged bees as compared with hive bees, with overwhelming downregulation in all gene categories in caged bees at week 4. We identified two sets of genes that were constantly regulated in caged bees, including Rsod with unknown function in insects that could potentially characterize caging stress in honey bees. [ABSTRACT FROM AUTHOR]

Published
2019
Full Text
View/download PDF

42. First transgenic trait for control of plant bugs and thrips in cotton.

Author

Akbar, Waseem, Gowda, Anilkumar, Ahrens, Jeffrey E, Stelzer, Jason W, Brown, Robert S, Bollman, Scott L, Greenplate, John T, Gore, Jeffrey, Catchot, Angus L, Lorenz, Gus, Stewart, Scott D, Kerns, David L, Greene, Jeremy K, Toews, Michael D, Herbert, David A, Reisig, Dominic D, Sword, Gregory A, Ellsworth, Peter C, Godfrey, Larry D, and Clark, Thomas L

Subjects
HEMIPTERA, THRIPS, PEST control, WOUNDS & injuries, AGRICULTURAL ecology
Abstract

BACKGROUND: Plant bugs (Lygus spp.) and thrips (Thrips spp.) are two of the most economically important insect pest groups impacting cotton production in the USA today, but are not controlled by current transgenic cotton varieties. Thus, seed or foliar‐applied chemical insecticides are typically required to protect cotton from these pest groups. Currently, these pests are resistant to several insecticides, resulting in fewer options for economically viable management. Previous publications documented the efficacy of transgenic cotton event MON 88702 against plant bugs and thrips in limited laboratory and field studies. Here, we report results from multi‐location and multi‐year field studies demonstrating efficacy provided by MON 88702 against various levels of these pests. RESULTS: MON 88702 provided a significant reduction in numbers of Lygus nymphs and subsequent yield advantage. MON 88702 also had fewer thrips and minimal injury. The level of control demonstrated by this transgenic trait was significantly better compared with its non‐transgenic near‐isoline, DP393, receiving insecticides at current commercial rates. CONCLUSION: The level of efficacy demonstrated here suggests that MON 88702, when incorporated into existing IPM programs, could become a valuable additional tool for management of Lygus and thrips in cotton agroecosystems experiencing challenges of resistance to existing chemical control strategies. © 2018 The Authors. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry. The present study describes a breakthrough with regards to development of a transgenic trait for control of hemipteran and thysanopteran pests of cotton which are not sensitive to existing transgenic traits. [ABSTRACT FROM AUTHOR]

Published
2019
Full Text
View/download PDF

47. Profiling the prosumer in the workplace : an exploration of traits, self-efficacy and motivators

Author

Stewart, Scott D. and Stewart, Scott D.

Abstract

This research has built on the growing interest in the prosumer in the workplace – prosumers are those users with high technological skills who both produce and consume their own technology solutions. Prosumers are leaders in their industrial or professional fields and who expect to obtain significant benefit from innovating. The literature reveals that commercially attractive products tend to be developed by prosumers who are at the leading edge of important marketplace trends and therefore this group is increasingly important. This study surveyed prosumers across a variety of occupations and workplaces and explored the motivators and personality traits of the prosumer.

Published
2014

49. Modeling Solid State Detonation and Reactive Materials

Author

AIR FORCE RESEARCH LAB EGLIN AFB FL MUNITIONS DIRECTORATE, Lambert, David E., Yoo, Sunhee, Stewart, Scott D., Lieber, Mark A., Szuck, Matthew J., AIR FORCE RESEARCH LAB EGLIN AFB FL MUNITIONS DIRECTORATE, Lambert, David E., Yoo, Sunhee, Stewart, Scott D., Lieber, Mark A., and Szuck, Matthew J.

Abstract

Solid state detonation (SSD) refers to non-classical phenomena whereby chemical reaction sustains a self-propagation wave in energetic materials that are not typically considered explosives. This wave phenomenon can be observed when fast 'shock induced' reactions occur as the result of deformation during the crush-up of the powders to their full density. We demonstrate that SSD, modeled with a simple phenomenological model, nominally runs at pressures much lower than what is observed in "ideal" explosives. However the lead wave head is not a classical shock in the sense of ZND theory, but rather a subsonic compaction wave. Hence the SSD is not strictly steady but rather quasi-steady. Analytical results from steady wave analysis are confirmed by direct simulation that includes the transients of the transition to quasi-steady self sustained reaction applied to a mixture of aluminum-Teflon reactive material., Prepared in cooperation with University of Illinois.

Published
2010

50. Confirmed Distribution and Occurrence of Megacopta cribraria (F.) (Hemiptera: Heteroptera: Plataspidae) in the Southeastern United States

Author

Gardner, Wayne A., primary, Peeler, Harold B., additional, LaForest, Joseph, additional, Roberts, Phillip M., additional, Sparks, Alton N., additional, Greene, Jeremy K., additional, Reisig, Dominic, additional, Suiter, Daniel R., additional, Bacheler, Jack S., additional, Kidd, Kathleen, additional, Ray, Charles H., additional, Ping Hu, Xing, additional, Kemerait, Robert C., additional, Scocco, Erika A., additional, Eger, Joseph E., additional, Ruberson, John R., additional, Sikora, Edward J., additional, Ames Herbert, D., additional, Campana, Charlotte, additional, Halbert, Susan, additional, Stewart, Scott D., additional, David Buntin, G., additional, Toews, Michael D., additional, and Bargeron, Charles T., additional

Published
2013
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results