John W. VanDuyn

Works (29)

Updated: April 4th, 2024 22:42

2010 article

Relationship Between External Stink Bug (Hemiptera: Pentatomidae) Boll-Feeding Symptoms and Internal Boll Damage With Respect to Cotton Lint Gin-Out and Fiber Quality

Blinka, E. L., Herbert, A., Malone, S., Duyn, J. W. V., Roberts, P., Bradley, J. R., & Bacheler, J. S. (2010, December 1). Journal of Economic Entomology.

By: E. Blinka*, A. Herbert*, S. Malone *, J. Duyn n, P. Roberts*, J. Bradley n, J. Bacheler n

author keywords: stink bug; cotton; boll damage; external lesions; sampling
MeSH headings : Animals; Cotton Fiber / standards; Feeding Behavior; Gossypium / parasitology; Heteroptera / physiology; Host-Parasite Interactions
topics (OpenAlex): Hemiptera Insect Studies; Insect-Plant Interactions and Control; Research on scale insects
TL;DR: Predictability plots indicated a rapid increase in relationship strength when relating external stink bug lesions to internal damage as the number of external lesions increased, and Gin-turnout and fiber quality decreased with increasing intensity of internal stink bug damage. (via Semantic Scholar)
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UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
13. Climate Action (Web of Science)
15. Life on Land (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2010 article

Spatial and temporal variability in host use by Helicoverpa zea as measured by analyses of stable carbon isotope ratios and gossypol residues

Head, G., Jackson, R. E., Adamczyk, J., Bradley, J. R., Duyn, J. V., Gore, J., … Voth, R. (2010, March 30). Journal of Applied Ecology.

By: G. Head *, R. Jackson*, J. Adamczyk, J. Bradley n, J. Duyn n, J. Gore*, D. Hardee*, B. Leonard* ...

author keywords: Bacillus thuringiensis; cotton; cotton bollworm; insect resistance management; refuge
topics (OpenAlex): Insect Resistance and Genetics; Genetically Modified Organisms Research; Insect and Pesticide Research
TL;DR: Structured refuges, consisting of non-Bt cotton, have been a mandated part of this strategy to produce non-selected insects that are temporally and spatially synchronous with insects from the Bt crop, diluting Bt resistance alleles through mating. (via Semantic Scholar)
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2009 article

Fidelity of External Boll Feeding Lesions to Internal Damage for Assessing Stink Bug Damage in Cotton

Toews, M. D., Blinka, E. L., duyn, J. W. V., Herbert, D. A., Bacheler, J. S., Roberts, P. M., & Greene, J. K. (2009, May 28). Journal of Economic Entomology.

By: M. Toews *, E. Blinka*, J. duyn*, D. Herbert*, J. Bacheler*, P. Roberts*, J. Greene *

author keywords: Euschistus servus; Acrosternum hilare; Nezara viridula; tally threshold; sample size
MeSH headings : Animals; Feeding Behavior / physiology; Fruit / parasitology; Gossypium / parasitology; Hemiptera / physiology; Insect Control / methods; Linear Models; Plant Diseases / parasitology
topics (OpenAlex): Hemiptera Insect Studies; Insect-Plant Interactions and Control; Entomopathogenic Microorganisms in Pest Control
TL;DR: Evaluated enumeration of external feeding lesions on groups of 10, 15, 20, or 25 bolls per sample as an alternative sampling procedure suggested that examination of external lesions is a promising method for estimating stink bug damage in cotton. (via Semantic Scholar)
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
13. Climate Action (Web of Science)
15. Life on Land (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2008 article

Efficacy of Transgenic Cotton Expressing Cry1Ac and Cry1F Insecticidal Protein Against Heliothines (Lepidoptera: Noctuidae)

Siebert, M. W., Nolting, S., Leonard, B. R., Braxton, L. B., All, J. N., Duyn, J. W. V., … Huckaba, R. M. (2008, December 1). Journal of Economic Entomology.

By: M. Siebert, S. Nolting, B. Leonard, L. Braxton, J. All*, J. Duyn n, J. Bradley n, J. Bacheler n, R. Huckaba*

author keywords: Bacillus thuringiensis; cotton; integrated pest management; tobacco budworm; bollworm
MeSH headings : Animals; Bacillus thuringiensis Toxins; Bacterial Proteins / genetics; Bacterial Proteins / metabolism; Endotoxins / genetics; Endotoxins / metabolism; Gossypium / genetics; Gossypium / growth & development; Hemolysin Proteins / genetics; Hemolysin Proteins / metabolism; Insect Control / methods; Insecticides; Moths; Plants, Genetically Modified / growth & development; Plants, Genetically Modified / metabolism; United States
topics (OpenAlex): Insect Resistance and Genetics; Insect-Plant Interactions and Control; Research in Cotton Cultivation
TL;DR: In situations of moderate to high heliothine infestations, cotton plants expressing Cry1Ac and Cry1F may sustain higher levels of damage compared with that same variety in low infestation levels, indicating cotton plants may compensate for those levels of plant damage. (via Semantic Scholar)
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2008 article

Evaluation of Corn Hybrids Expressing CrylF (Herculex® I Insect Protection) Against Fall Armyworm (Lepidoptera: Noctuidae) in the Southern United States

Siebert, M. W., Tindall, K. V., Leonard, B. R., Duyn, J. W. V., & Babcock, J. M. (2008, January 1). Journal of Entomological Science.

By: M. Siebert, K. Tindall, B. Leonard, J. Duyn* & J. Babcock

author keywords: Cry1F; Bacillus thuringiensis; var. aizawai; transgenic corn; Spodoptera frugiperda; TC1507
topics (OpenAlex): Insect Resistance and Genetics; Insect Pest Control Strategies; Viral Infectious Diseases and Gene Expression in Insects
TL;DR: It is demonstrated that corn hybrids containing CrylF represent an effective plant incorporated insecticidal protein management option for fall armyworm in environments where fall armyworms may exceed damage thresholds and have to be carefully managed. (via Semantic Scholar)
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2008 article

Regional assessment of Helicoverpa zea populations on cotton and non‐cotton crop hosts

Jackson, R. E., Bradley, J. R., Duyn, J. V., Leonard, B. R., Allen, K. C., Luttrell, R., … Head, G. (2008, January 3). Entomologia Experimentalis Et Applicata.

By: R. Jackson*, J. Bradley n, J. Duyn n, B. Leonard*, K. Allen *, R. Luttrell*, J. Ruberson *, J. Adamczyk * ...

author keywords: Bacillus thuringiensis; bollworm; alternative hosts; resistance management; Lepidoptera; Noctuidae; refuge; Cry protein; maize; grain sorghum; peanut; soybean
topics (OpenAlex): Insect Resistance and Genetics; Insect and Pesticide Research; Insect Pest Control Strategies
TL;DR: It is demonstrated that substantial natural refuge is present for Bt‐resistance management of H. zea throughout the mid‐South and Southeast portions of the US cotton belt and that adults move extensively from their natal host origins. (via Semantic Scholar)
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2007 article

Cross-Resistance Responses of Cry1Ac-Selected <I>Heliothis virescens</I> (Lepidoptera: Noctuidae) to the <I>Bacillus thuringiensis</I> Protein Vip3A

Jackson, R. E., Marcus, M. A., Gould, F., Bradley, J. R., & Duyn, J. W. V. (2007, February 1). Journal of Economic Entomology, Vol. 100, pp. 180–186.

By: R. Jackson*, M. Marcus, F. Gould* , J. Bradley* & J. Duyn*

author keywords: Bacillus thuringiensis; Vip3A; Heliothis virescens; cross-resistance; resistance management
topics (OpenAlex): Insect Resistance and Genetics; Insect and Pesticide Research; Insect Pest Control Strategies
TL;DR: Results of these experiments demonstrate that cross-resistance is nonexistent between Cry1Ac and Vip3A in H. virescens, and the introduction of VIP3A-producing lines could delayCry1Ac-res resistance evolution in H., if these lines gain a significant share of the market. (via Semantic Scholar)
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
3. Good Health and Well-being (OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2006 article

Genetic Variation for Resistance to <I>Bacillus thuringiensis</I> Toxins in <I>Helicoverpa zea</I> (Lepidoptera: Noctuidae) in Eastern North Carolina

Jackson, R. E., Gould, F., Bradley, J. R., & duyn, J. W. V. (2006, October 1). Journal of Economic Entomology, Vol. 99, pp. 1790–1797.

By: R. Jackson n, F. Gould* , J. Bradley* & J. duyn*

MeSH headings : Animals; Bacillus thuringiensis Toxins; Bacterial Proteins; Bacterial Toxins; Endotoxins; Female; Genetic Variation; Gossypium / parasitology; Hemolysin Proteins; Insecticide Resistance / genetics; Larva / growth & development; Moths / genetics; Moths / growth & development; North Carolina
topics (OpenAlex): Insect Resistance and Genetics; Genetically Modified Organisms Research; Insect and Pesticide Research
TL;DR: Results suggesting partially dominant inheritance of resistance to Cry1Ac and Cry2Ab, are critically important for determining appropriate resistance management strategies that impact the sustainability of transgenic cotton, Gossypium hirsutum. (via Semantic Scholar)
Sources: NC State University Libraries, NC State University Libraries
Added: August 6, 2018

2006 article

Impact of Small Fitness Costs on Pest Adaptation to Crop Varieties with Multiple Toxins: A Heuristic Model

Gould, F., Cohen, M. B., Bentur, J. S., Kennedy, G. G., & Duyn, J. V. (2006, December 1). Journal of Economic Entomology, Vol. 99, pp. 2091–2099.

By: F. Gould n , M. Cohen, J. Bentur, G. Kennedy*  & J. Duyn*

MeSH headings : Adaptation, Physiological / genetics; Alleles; Animals; Bacillus thuringiensis / pathogenicity; Bacterial Toxins / pharmacology; Gene Frequency; Insecticide Resistance; Models, Biological; Plants, Genetically Modified; Toxins, Biological / chemistry
topics (OpenAlex): Insect Resistance and Genetics; Insect and Pesticide Research; Insect-Plant Interactions and Control
TL;DR: A deterministic two-locus model was used to examine how small fitness costs to individuals carrying resistance alleles could impact the risk of panmictic insect pest populations adapting to crop varieties that produced two distinct toxins. (via Semantic Scholar)
Sources: NC State University Libraries, NC State University Libraries
Added: August 6, 2018

2005 journal article

The impact of transgenic cottons expressing one or two proteins from Bacillus thuringiensis on survival and damage potential of first and second instars of Ostrinia nubilalis (Lepidoptera: Crambidae)

Journal of Cotton Science (Online), 9(4), 199.

By: R. Jackson, J. Mahaffey, J. Bradley, J. Van Duyn & C. Sorenson

Source: NC State University Libraries
Added: August 6, 2018

2004 article

Comparative Production of <I>Helicoverpa zea</I> (Lepidoptera: Noctuidae) from Transgenic Cotton Expressing Either One or Two <I>Bacillus thuringiensis</I> Proteins with and without Insecticide Oversprays

Jackson, R. E., Bradley, J. R., Duyn, J. W. V., & Gould, F. (2004, October 1). Journal of Economic Entomology, Vol. 97, pp. 1719–1725.

By: R. Jackson n, J. Bradley n, J. Duyn n & F. Gould n 

author keywords: Bacillus thuringiensis; bollworm; cotton; Helicoverpa zea; resistance management
MeSH headings : Animals; Bacillus thuringiensis; Bacillus thuringiensis Toxins; Bacterial Proteins / biosynthesis; Bacterial Toxins / biosynthesis; Endotoxins / biosynthesis; Gossypium / genetics; Gossypium / parasitology; Hemolysin Proteins; Insecticide Resistance; Insecticides; Lepidoptera; Pest Control, Biological / methods; Plants, Genetically Modified; Population Dynamics
topics (OpenAlex): Insect Resistance and Genetics; Genetically Modified Organisms Research; Viral Infectious Diseases and Gene Expression in Insects
TL;DR: The addition of pyrethroid oversprays to Bollgard II cotton seemed to be the best resistance management strategy available for bollworm because no bollworms were capable of completing development under these conditions. (via Semantic Scholar)
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2004 article

Performance of Feral and Cry1Ac-Selected Helicoverpa zea (Lepidoptera: Noctuidae) Strains on Transgenic Cottons Expressing One or Two Bacillus thuringiensis ssp. kurstaki Proteins Under Greenhouse Conditions

Jackson, R. E., Bradley, J. R., & Duyn, J. W. V. (2004, January 1). Journal of Entomological Science.

By: R. Jackson n, J. Bradley n & J. Duyn n

author keywords: Bacillus thuringiensis; Helicoverpa zea; bollworm; cotton
topics (OpenAlex): Insect Resistance and Genetics; Viral Infectious Diseases and Gene Expression in Insects; Insect and Pesticide Research
TL;DR: Transgenic cottons that express either one or two Bacillus thuringiensis Berliner proteins, respectively, along with the conventional sister genotype, demonstrated that when averaged across bollworm strains, the Bollgard II genotype significantly reduced larval survival and fruit penetration by bollworms compared to the Boll Gardner variety. (via Semantic Scholar)
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2003 article

Estimated Frequency of Nonrecessive <I>Bt</I> Resistance Genes in Bollworm, <I>Helicoverpa zea</I> (Boddie) (Lepidoptera: Noctuidae) in Eastern North Carolina

Burd, A. D., Gould, F., Bradley, J. R., Duyn, J. W. V., & Moar, W. J. (2003, February 1). Journal of Economic Entomology, Vol. 96, pp. 137–142.

By: A. Burd*, F. Gould* , J. Bradley*, J. Duyn* & W. Moar

author keywords: Bacillus thuringiensis; Bt resistance; gene frequency; bollworm
topics (OpenAlex): Insect Resistance and Genetics; Insect Pest Control Strategies; Insect and Pesticide Research
TL;DR: Results that indicate partially dominant inheritance of Cry1Ac resistance in bollworm are important for determining the rate of resistance evolution in H. zea to specific Bt toxins. (via Semantic Scholar)
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2003 article

Sensitivity Analysis of a Spatially-Explicit Stochastic Simulation Model of the Evolution of Resistance in <I>Helicoverpa zea</I> (Lepidoptera: Noctuidae) to Bt Transgenic Corn and Cotton

Storer, N. P., Peck, S. L., Gould, F., Duyn, J. W. V., & Kennedy, G. G. (2003, February 1). Journal of Economic Entomology, Vol. 96, pp. 173–187.

By: N. Storer, S. Peck*, F. Gould* , J. Duyn* & G. Kennedy* 

author keywords: Bacillus thuringiensis; transgenic crops; computer simulation; resistance management
topics (OpenAlex): Insect Resistance and Genetics; Entomopathogenic Microorganisms in Pest Control; Genetically Modified Organisms Research
TL;DR: The sensitivities of a model simulating the evolution of resistance in Helicoverpa zea to Bt toxins in transgenic crops were investigated by examining effects of each of the model parameters on the frequency of resistance alleles after 8 yr, and can be used as a scientific basis for devising a robust resistance management strategy for Bt crops. (via Semantic Scholar)
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science; OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2003 article

Spatial Processes in the Evolution of Resistance in <I>Helicoverpa zea</I> (Lepidoptera: Noctuidae) to Bt Transgenic Corn and Cotton in a Mixed Agroecosystem: a Biology-rich Stochastic Simulation Model

Storer, N. P., Peck, S. L., Gould, F., Duyn, J. W. V., & Kennedy, G. G. (2003, February 1). Journal of Economic Entomology, Vol. 96, pp. 156–172.

By: N. Storer, S. Peck*, F. Gould* , J. Duyn* & G. Kennedy* 

author keywords: Bacillus thuringiensis; transgenic crops; computer simulation; resistance management
topics (OpenAlex): Insect Resistance and Genetics; Genetically Modified Organisms Research; Entomopathogenic Microorganisms in Pest Control
TL;DR: A simulation model is developed to examine the role of spatial processes in the evolution of resistance in Helicoverpa zea populations to Bt corn and Bt cotton and suggests that farm-level refuge requirements are important for managing the risk of resistance. (via Semantic Scholar)
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science; OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2002 article

Effect of Insecticide Treatments and Environmental Factors on Thrips Populations, Plant Growth and Yield of Cotton

Faircloth, J. C., Bradley, J. R., & Duyn, J. W. V. (2002, October 1). Journal of Entomological Science.

By: J. Faircloth n, J. Bradley n & J. Duyn n

author keywords: Frankliniella fusca; Frankliniella occidentalis; Frankliniella tritici; Thrips tabaci; Neohydatothrips variabilis; Gossypium hirsutum
topics (OpenAlex): Insect-Plant Interactions and Control; Research in Cotton Cultivation; Plant Virus Research Studies
TL;DR: Field experiments were conducted in 1997–1999 in Washington Co., NC, to examine how cotton, Gossypium hirsutum, is affected by thrips species composition and abundance, environmental factors, and other factors. (via Semantic Scholar)
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
13. Climate Action (Web of Science)
15. Life on Land (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2002 article

Influence of Cotton Microhabitat on Temperature and Survival ofTrichogramma(Hymenoptera: Trichogrammatidae) within Cardboard Capsules

Suh, C. P.-C., Orr, D. B., Duyn, J. W. V., & Borchert, D. M. (2002, April 1). Environmental Entomology.

By: C. Suh n, D. Orr n, J. Duyn n & D. Borchert n

author keywords: cotton; microclimate; microhabitat; Trichogramma augmentation; augmentative biological control
topics (OpenAlex): Insect-Plant Interactions and Control; Plant and animal studies; Insect behavior and control techniques
TL;DR: Suitability of the soil surface as a release site for Trichogramma capsules depended significantly on the level of canopy closure, location of capsules relative to the center of rows, and length of time capsules remained in the field before parasitoid emergence, and these factors should be considered when implementing augmentative releases of Trichogramsma wasps in cotton. (via Semantic Scholar)
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
13. Climate Action (Web of Science)
15. Life on Land (Web of Science; OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2001 article

Life History Traits of <I>Helicoverpa zea</I> (Lepidoptera: Noctuidae) on Non-Bt and Bt Transgenic Corn Hybrids in Eastern North Carolina

Storer, N. P., Duyn, J. W. V., & Kennedy, G. G. (2001, October 1). Journal of Economic Entomology, Vol. 94, pp. 1268–1279.

By: N. Storer  n, J. Duyn n & G. Kennedy n 

author keywords: Bacillus thuringiensis; corn earworm; transgenic crops; sublethal effects
MeSH headings : Animals; Bacillus thuringiensis / genetics; Bacillus thuringiensis Toxins; Bacterial Proteins / genetics; Bacterial Toxins / genetics; Body Weight; Chimera; Endotoxins / genetics; Female; Hemolysin Proteins; Larva / growth & development; Male; Moths / growth & development; North Carolina; Pest Control, Biological / methods; Plants, Genetically Modified; Pupa / growth & development; Time Factors; Zea mays
topics (OpenAlex): Insect Resistance and Genetics; Insect and Pesticide Research; Genetically Modified Organisms Research
TL;DR: Transgenic varieties of field corn that express the Cry1Ab B. thuringiensis (Bt) toxin in ear tissue present the potential of reducing ear feeding by the corn earworm, Helicoverpa zea, and for reducing the size of populations of the insect infesting other host crops. (via Semantic Scholar)
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2001 article

Planting Date Effects on Heliothine Larval Numbers, Fruit Damage, and Yield of Transgenic B.t. Cotton in North Carolina

Agi, A. L., Burd, A., Bradley, J. R., & Duyn, J. W. V. (2001, October 1). Journal of Entomological Science.

By: A. Agi n, A. Burd, J. Bradley n & J. Duyn n

author keywords: cotton; bollworm; Helicoverpa zea; Bacillus thuringiensis; transgenic
topics (OpenAlex): Insect Resistance and Genetics; Insect-Plant Interactions and Control; Genetically Modified Organisms Research
TL;DR: The susceptibility of Bollgard® cotton and non-B.t. cotton to bollworm, Helicoverpa zea (Boddie), was examined under contrasting crop management strategies in northeastern North Carolina in 1995. (via Semantic Scholar)
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2001 journal article

Reproductive success and damage potential of tobacco thrips and western flower thrips on cotton seedlings in a greenhouse environment

Journal of Agricultural and Urban Entomology, 18(3), 179–185.

By: J. Faircloth, J. Bradley, J. Van Duyn & R. Groves

Source: NC State University Libraries
Added: August 6, 2018

2000 article

<I>Trichogramma exiguum</I> (Hymenoptera: Trichogrammatidae) Releases in North Carolina Cotton: Evaluation of Heliothine Pest Suppression

Suh, C. P.-C., Orr, D. B., Duyn, J. W. V., & Borchert, D. M. (2000, August 1). Journal of Economic Entomology.

By: C. Suh n, D. Orr n, J. Duyn n & D. Borchert n

author keywords: Trichogramma exiguum; augmentation biological control; cotton bollworm
MeSH headings : Animals; Evaluation Studies as Topic; Female; Larva; Moths / parasitology; North Carolina; Ovum; Pest Control, Biological / methods; Wasps
topics (OpenAlex): Insect-Plant Interactions and Control; Plant Virus Research Studies; Agronomic Practices and Intercropping Systems
TL;DR: It is concluded that Trichogramma augmentation is not an effective heliothine management tool in North Carolina cotton. (via Semantic Scholar)
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
13. Climate Action (Web of Science)
15. Life on Land (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2000 article

<I>Trichogramma</I> Releases in North Carolina Cotton: Why Releases Fail to Suppress Heliothine Pests

Suh, C. P.-C., Orr, D. B., & Duyn, J. W. V. (2000, August 1). Journal of Economic Entomology.

By: C. Suh n, D. Orr n & J. Duyn n

author keywords: Trichogramma exiguum; heliothines; egg fate; compensatory mortality
MeSH headings : Animals; Female; Gossypium; Larva; Moths / parasitology; North Carolina; Ovum; Pest Control, Biological / methods; Quality Control; Wasps
topics (OpenAlex): Insect-Plant Interactions and Control; Research in Cotton Cultivation; Plant Virus Research Studies
TL;DR: Combined analysis of the heliothine larval populations and egg fate data revealed that the additional egg mortality produced by released T. exiguum was offset by lower larval mortality in release plots and there was no significant difference in larval density between T.Exiguum release and control plots. (via Semantic Scholar)
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
3. Good Health and Well-being (OpenAlex)
13. Climate Action (Web of Science)
15. Life on Land (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2000 article

Comparison of Two Computer Techniques and a Visual Technique for the Estimation of Wheat Leaf Consumption by Cereal Leaf Beetle (Coleoptera: Chrysomelidae)

Sorenson, C. E., Ihrig, R. A., Bradley, J. R., Duyn, J. W. V., & Herbert, D. A. (2000, October 1). Journal of Entomological Science.

By: C. Sorenson n, R. Ihrig n, J. Bradley n, J. Duyn n & D. Herbert n

author keywords: defoliation estimation; cereal leaf beetle; Oulema melanopus; visual estimation; image analysis
topics (OpenAlex): Leaf Properties and Growth Measurement; Remote Sensing in Agriculture; Greenhouse Technology and Climate Control
TL;DR: Three techniques for estimating wheat foliage defoliation by cereal leaf beetle, Oulema melanopus (L.), larvae were evaluated. (via Semantic Scholar)
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
13. Climate Action (Web of Science)
15. Life on Land (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2000 article

Effect of Insecticides on <I>Trichogramma exiguum</I> (Trichogrammatidae: Hymenoptera) Preimaginal Development and Adult Survival

Suh, C. P.-C., Orr, D. B., & Duyn, J. W. V. (2000, June 1). Journal of Economic Entomology.

By: C. Suh n, D. Orr n & J. Duyn n

author keywords: Trichogramma exiguum; bollworm insecticides; biological control; cotton
MeSH headings : Animals; Biological Assay; Female; Hydrazines; Insecticides; Juvenile Hormones; Moths / parasitology; Nitriles; Pyrethrins; Thiocarbamates; Wasps / growth & development; Wasps / physiology
topics (OpenAlex): Insect-Plant Interactions and Control; Insect behavior and control techniques; Insect Resistance and Genetics
TL;DR: Regardless of the developmental stage treated, none of the insecticides tested had a significant effect on the sex ratio or frequency of brachyptery of emerged females, however, the mean life span of emerged T. exiguum females significantly varied among insecticide treatments, and was significantly affected by the developmentalStage of parasitoid when treated. (via Semantic Scholar)
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
13. Climate Action (Web of Science)
15. Life on Land (Web of Science)
Source: Web Of Science
Added: August 6, 2018

1999 journal article

Evolution of region-wide resistance in cotton bollworm to Bt cotton as influenced by Bt corn: Identification of key factors through computer simulation

Beltwide Cotton Conferences. Proceedings, 2(1999), 952–956.

By: N. Storer, F. Gould , G. Kennedy , S. Peck & J. Van Duyn

Source: NC State University Libraries
Added: August 6, 2018

1999 journal article

Performance of selected Bt cotton genotypes against bollworm in North Carolina

Beltwide Cotton Conferences. Proceedings, 2(1999), 931–934.

John VanDuyn; Julius Bradley; Anthony David Burd

Source: NC State University Libraries
Added: August 6, 2018

1998 journal article

Bollworm (Helicoverpa zea): adaptation to BT toxin?

Beltwide Cotton Conferences. Proceedings, 2(1998), 1033–1037.

By: A. Lambert, J. Bradley, F. Gould  & J. Van Duyn

Source: NC State University Libraries
Added: August 6, 2018

1998 journal article

Reevaluation of Trichogramma releases for suppression of heliothine pests in cotton

Beltwide Cotton Conferences. Proceedings, 2(1998), 1098–1101.

By: C. Suh, D. Orr & J. Van-Duyn

Source: NC State University Libraries
Added: August 6, 2018

1997 journal article

Interactions of Helicoverpa zea and BT cotton in North Carolina

Beltwide Cotton Conferences. Proceedings, 2(1997), 870–873.

A. L. Lambert; Julius Bradley; John VanDuyn

Source: NC State University Libraries
Added: August 6, 2018

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