Browsing by Author "Greene, Jeremy K."

Now showing 1 - 12 of 12
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    Effects of transgenic Bacillus thuringiensis cotton on insecticide use, heliothine counts, plant damage, and cotton yield: A meta-analysis, 1996-2015
    Fleming, Daniel; Musser, Fred; Reisig, Dominic; Greene, Jeremy K.; Taylor, Sally V.; Parajulee, Megha; Lorenz, Gus; Catchot, Angus; Gore, Jeffrey; Kerns, David; Stewart, Scott; Boykin, Deborah; Caprio, Michael; Little, Nathan (PLOS, 2018-07-19)
    The primary management tactic for lepidopteran pests of cotton in the United States of America (USA) is the use of transgenic cotton that produces Bacillus thuringiensis Berliner (Bt) toxins. The primary target pests of this technology are Helicoverpa zea (Boddie) and Heliothis virescens (F.) in the eastern and central Cotton Belt of the USA. Concerns over the evolution of resistance in H. zea to Bt toxins and scrutiny of the necessity of Btcrops has escalated. We reviewed published and unpublished data from field trials of Btcotton in the eastern and central Cotton Belt of the USA through 2015 to evaluate the effectiveness of Bt cotton (Bollgard, Bollgard II, WideStrike, WideStrike 3, and TwinLink). Btcotton reduced insecticide usage, reduced heliothine pest numbers and damage, and provided a yield benefit, but Bollgard II and WideStrike efficacy declined in the Midsouth over the period evaluated. In the Southeastern region, heliothine damage remained constant through 2015, but yield benefits declined from 2010 until 2015. Resistance of H. zea to several Bttoxins is the most plausible explanation for the observed changes in Btcotton efficacy. The introduction of new Bttoxins such as found in Widestrike 3 and Twinlink may preserve the benefits of Bt crops. However, while both Widestrike 3 and Twinlink had less damage than Widestrike, damage levels of both were similar to Bollgard II.
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    Field Guide to Stink Bugs of agricultural importance in the United States
    Herbert, D. Ames Jr.; Kamminga, Katherine; Malone, Sean M.; Kuhar, Thomas P.; Day, Eric R.; Greene, Jeremy K.; Bundy, C. Scott; Brown, Lydia; Ellsworth, Peter C. (Virginia Cooperative Extension, 2020)
    Descriptions of different types of stink bugs and the economic damage they can do to crops
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    Field Guide to Stink Bugs of Agricultural Importance in the United States
    Herbert, D. Ames Jr.; Kamminga, Katherine; Malone, Sean M.; Kuhar, Thomas P.; Day, Eric R.; Greene, Jeremy K.; Brown, Lydia; Ellsworth, Peter C. (Virginia Cooperative Extension, 2014-11-17)
    This field guide provides information on common and less common species of stink bugs in the United States. Text along with pictures helps with identification of eggs, nymphs and adults of both pests and beneficial species of stink bugs.
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    Field Guide to Stink Bugs of Agricultural Importance in the Upper Southern Region and Mid-Atlantic States
    Kamminga, Katherine; Herbert, D. Ames Jr.; Malone, Sean M.; Kuhar, Thomas P.; Greene, Jeremy K. (Virginia Cooperative Extension, 2009-07-29)
    This field guide provides information on common and less common species of stink bugs in the region. Text along with pictures helps with identification of eggs, nymphs and adults of both pest and beneficial species of stink bugs.
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    First transgenic trait for control of plant bugs and thrips in cotton
    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. (Wiley, 2018-12-18)
    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.
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    Magnitude and Extent of Helicoverpa zea Resistance Levels to Cry1Ac and Cry2Ab2 across the Southeastern USA
    Reisig, Dominic; Buntin, G. David; Greene, Jeremy K.; Paula-Moraes, Silvana V.; Reay-Jones, Francis; Roberts, Phillip; Smith, Ron; Taylor, Sally V. (MDPI, 2023-03-07)
    After resistance is first detected, continued resistance monitoring can inform decisions on how to effectively manage resistant populations. We monitored for resistance to Cry1Ac (2018 and 2019) and Cry2Ab2 (2019) from southeastern USA populations of Helicoverpa zea. We collected larvae from various plant hosts, sib-mated the adults, and tested neonates using diet-overlay bioassays and compared them to susceptible populations for resistance estimates. We also compared LC50 values with larval survival, weight and larval inhibition at the highest dose tested using regression, and found that LC50 values were negatively correlated with survival for both proteins. Finally, we compared resistance rations between Cry1Ac and Cry2Ab2 during 2019. Some populations were resistant to Cry1Ac, and most were resistant to CryAb2; Cry1Ac resistance ratios were lower than Cry2Ab2 during 2019. Survival was positively correlated with larval weight inhibition for Cry2Ab. This contrasts with other studies in both the mid-southern and southeastern USA, where resistance to Cry1Ac, Cry1A.105, and Cry2Ab2 increased over time and was found in a majority of populations. This indicates that cotton expressing Cry proteins in the southeastern USA was at variable risk for damage in this region.
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    Managing Stink Bugs in Cotton: Research in the Southeast Region
    Herbert, D. Ames Jr.; Blinka, Eric; Bacheler, Jack S.; Van Duyn, J. W.; Greene, Jeremy K.; Roberts, Phillip; Smith, Ron H. (Virginia Cooperative Extension, 2018-11-13)
    Describes the damage to cotton and economic impact of three species of stink bugs in the southeastern United States. Provides information on assessing population levels of stink bugs in cotton fields.
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    Managing Stink Bugs in Cotton: Research in the Southeast Region
    Herbert, D. Ames Jr.; Blinka, Eric; Bacheler, Jack S.; Van Duyn, J. W.; Greene, Jeremy K.; Roberts, Phillip; Smith, Ron H. (Virginia Cooperative Extension, 2009)
    Describes the damage to cotton and economic impact of three species of stink bugs in the southeastern United States. Provides information on assessing population levels of stink bugs in cotton fields.
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    Mid-Atlantic Guide to the Insect Pests and Beneficials of Corn, Soybean, and Small Grains
    Herbert, D. Ames Jr.; Malone, Sean M.; Dively, Galen; Greene, Jeremy K.; Tooker, John; Whalen, Joanne; Youngman, Roger R. (Virginia Cooperative Extension, 2011)
    This document offers brief descriptions and photos of common insect pests and beneficial insects in corn, soybean and small grain crops in the mid-Atlantic region.
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    Mid-Atlantic Guide to the Insect Pests and Beneficials of Corn, Soybean, and Small Grains
    Herbert, D. Ames Jr.; Malone, Sean M.; Dively, Galen; Greene, Jeremy K.; Tooker, John; Whalen, Joanne; Youngman, Roger R. (Virginia Cooperative Extension, 2018-11-13)
    Offers brief descriptions and photos of common insect bests and beneficial insects in corn, soybean, and small grain crops in the mid-Atlantic region.
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    Sampling Optimization and Crop Interface Effects on Lygus lineolaris Populations in Southeastern USA Cotton
    Dorman, Seth J.; Taylor, Sally V.; Malone, Sean; Roberts, Phillip M.; Greene, Jeremy K.; Reisig, Dominic D.; Smith, Ronald H.; Jacobson, Alana L.; Reay-Jones, Francis P. F.; Paula-Moraes, Silvana; Huseth, Anders S. (MDPI, 2022-01-13)
    Tarnished plant bug, Lygus lineolaris (Hemiptera: Miridae), is an economically damaging pest in cotton production systems across the southern United States. We systematically scouted 120 commercial cotton fields across five southeastern states during susceptible growth stages in 2019 and 2020 to investigate sampling optimization and the effect of interface crop and landscape composition on L. lineolaris abundance. Variance component analysis determined field and within-field spatial scales, compared with agricultural district and state, accounted for more variation in L. lineolaris density using sweep net and drop cloth sampling. This result highlights the importance of field-level scouting efforts. Using within-field samples, a fixed-precision sampling plan determined 8 and 23 sampling units were needed to determine L. lineolaris population estimates with 0.25 precision for sweep net (100 sweeps per unit) and drop cloth (1.5 row-m per unit) sampling, respectively. A spatial Bayesian hierarchical model was developed to determine local landscape (<0.5 km from field edges) effects on L. lineolaris in cotton. The proportion of agricultural area and double-crop wheat and soybeans were positively associated with L. lineolaris density, and fields with more contiguous cotton areas negatively predicted L. lineolaris populations. These results will improve L. lineolaris monitoring programs and treatment management decisions in southeastern USA cotton.
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    The Spatiotemporal Distribution, Abundance, and Seasonal Dynamics of Cotton-Infesting Aphids in the Southern U.S.
    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. (MDPI, 2023-07-15)
    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.