Walter E. Thomas

Works (27)

Updated: July 5th, 2023 15:59

2009 journal article

Absorption, Translocation, and Metabolism of Glufosinate in Transgenic and Nontransgenic Cotton, Palmer Amaranth (Amaranthus palmeri), and Pitted Morningglory (Ipomoea lacunosa)

WEED SCIENCE, 57(4), 357–361.

By: W. Everman n, W. Thomas n, J. Burton n, A. York n & J. Wilcut n

author keywords: Absorption; cotton; glufosinate; metabolism; translocation
TL;DR: Greenhouse studies were conducted to evaluate absorption, translocation, and metabolism of 14C-glufosinate in glufosinate-resistant cotton, nontransgenic cotton, Palmer amaranth, and pitted morningglory. (via Semantic Scholar)
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
13. Climate Action (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2008 journal article

A Comparison of Weed Control in Herbicide-Resistant, Herbicide-Tolerant, and Conventional Corn

WEED TECHNOLOGY, 22(4), 571–579.

By: I. Burke n, W. Thomas n, J. Allen*, J. Collins* & J. Wilcut n

author keywords: Glufosinate resistant; glyphosate resistant; herbicide systems; imidazolinone tolerant; weed management
TL;DR: Late-season control of common lambsquarters, large crabgrass, and yellow nutsedge increased with metolachlor PRE compared with no PRE herbicide treatment, while control of glyphosate and glufosinate systems for each POST over-the-top herbicide system was similar. (via Semantic Scholar)
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
13. Climate Action (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2008 journal article

Glufosinate-resistant corn interference in glufosinate-resistant cotton

WEED TECHNOLOGY, 22(2), 211–216.

By: S. Clewis*, W. Thomas*, W. Everman* & J. Witcut

author keywords: competition; economic threshold; models; weed biomass; weed density; plant height
TL;DR: The examined GUR corn densities had a significant effect on cotton yield but not as significant as many other problematic grass and broadleaf weeds. (via Semantic Scholar)
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
13. Climate Action (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2007 journal article

Absorption and translocation of glyphosate and sucrose in glyphosate-resistant cotton

WEED TECHNOLOGY, 21(2), 459–464.

By: W. Thomas*, W. Everman*, I. Burke*, C. Koger & J. Wilcut*

author keywords: herbicide-resistant crops; transgenic crops
TL;DR: On the basis of the percentage of 14C exported out of the treated leaf, glyphosate and sucrose translocation patterns were similar, indicating that glyphosate may be used as a photoassimilate model in GRE2 cotton. (via Semantic Scholar)
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
13. Climate Action (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2007 journal article

Economic assessment of weed management systems in glufosinate-resistant, glyphosate-resistant, imidazolinone-tolerant, and nontransgenic corn

WEED TECHNOLOGY, 21(1), 191–198.

By: W. Thomas n, W. Everman n, J. Allen*, J. Collins* & J. Wilcut n

author keywords: transgenic crops; herbicide-resistant; net returns; ametryn; atrazine; imazapyr; imazethapyr; S-metolachlor; nicosulfuron; rimsulfuron
TL;DR: Net returns were maximized with treatments that provided excellent weed control with minimal inputs and the addition of ametryn at LAYBY to a single EPOST system without S-metolachlor was beneficial for improving control of morningglory species, common lambsquarters, and Palmer amaranth, depending on location. (via Semantic Scholar)
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
13. Climate Action (Web of Science)
15. Life on Land (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2007 journal article

Glyphosate-resistant corn interference in glyphosate-resistant cotton

WEED TECHNOLOGY, 21(2), 372–377.

By: W. Thomas*, W. Everman*, S. Clewis* & J. Wilcut*

author keywords: competition; economic threshold; models; weed biomass; weed density; plant height.
TL;DR: Examination of density-dependent effects of glyphosate-resistant (GR) corn on GR cotton growth and lint yield found that GR corn densities had a significant effect on cotton yield, but not as significant as many other problematic grass and broadleaf weeds. (via Semantic Scholar)
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
13. Climate Action (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2007 journal article

Palmer amaranth interference and seed production in peanut

WEED TECHNOLOGY, 21(2), 367–371.

By: I. Burke*, M. Schroeder, W. Thomas* & J. Wilcut*

author keywords: density-dependent effects; competition
TL;DR: The rapid increase in Palmer amaranth height at Goldsboro correspondingly reduced the maximum peanut canopy diameter at that location, although the growth trends for peanuts canopy diameter were similar for both locations. (via Semantic Scholar)
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science; OpenAlex)
13. Climate Action (Web of Science)
Sources: Web Of Science, ORCID
Added: August 6, 2018

2007 journal article

Rain-free requirement and physiological properties of cotton plant growth regulators

PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY, 88(3), 247–251.

By: W. Thomas*, W. Everman*, J. Collins, C. Koger & J. Wilcut*

author keywords: plant height; absorption; translocation; rain-free period; leaf area
TL;DR: A rain-free period of 8 h is needed to maximize efficacy, regardless of the use of surfactant in the case of a new cotton plant growth regulator. (via Semantic Scholar)
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
13. Climate Action (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2007 journal article

Yield and physiological response of peanut to glyphosate drift

WEED TECHNOLOGY, 21(4), 954–960.

By: B. Lassiter n, I. Burke n, W. Thomas n, W. Pline-Srnic n, D. Jordan n, J. Wilcut n, G. Wilkerson n

author keywords: herbicide drift; shikimic acid accumulation
TL;DR: Five experiments were conducted to evaluate peanut injury and pod yield when glyphosate was applied to 10 to 15 cm diameter peanut plants at rates ranging from 9 to 1,120 g ai/ha and shikimic acid accumulation was determined in three of the five experiments. (via Semantic Scholar)
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science; OpenAlex)
13. Climate Action (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2006 journal article

A seedling assay to screen aryloxyphenoxypropionic acid and cyclohexanedione resistance in johnsongrass (Sorghum halepense)

WEED TECHNOLOGY, 20(4), 950–955.

By: I. Burke*, W. Thomas n, J. Burton n, J. Spears n & J. Wilcut n

author keywords: ACCase inhibitors; herbicide resistance
TL;DR: A seedling bioassay was developed for the rapid diagnosis of resistance to clethodim and fluazifop-P in johnsongrass based on differences in the coleoptile length of susceptible (S) and resistant (R) seedlings exposed to cle thirdodim or fluaz ifop in petri dishes for 5 d. (via Semantic Scholar)
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
13. Climate Action (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2006 journal article

Glyphosate-resistant cotton (Gossypium hirsutum) response and weed management with trifloxysulfuron, glyphosate, prometryn, and MSMA

WEED TECHNOLOGY, 20(1), 6–13.

By: W. Thomas n, T. Britton n, S. Clewis n, S. Askew* & J. Wilcut n

author keywords: diammonium salt; isopropylamine salt
TL;DR: Prometryn plus MSMA LAYBY improved late-season control of common lambsquarters, goosegrass, large crabgrass, and pitted morningglory for all EPOST systems and improved late -season smooth pigweed control for EPOST Systems that did not include trifloxysulfuron. (via Semantic Scholar)
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
13. Climate Action (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2006 journal article

Influence of environmental factors on slender amaranth (Amaranthus viridis) germination

Weed Science, 54(2), 316–320.

By: W. Thomas n, I. Burke n, J. Spears n & J. Wilcut*

UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Source: NC State University Libraries
Added: August 6, 2018

2005 journal article

Assessment of two nondestructive assays for detecting glyphosate resistance in horseweed (Conyza canadensis)

WEED SCIENCE, 53(4), 438–445.

By: C. Koger, D. Shaner*, W. Henry *, T. Nadler-Hassar*, W. Thomas n & J. Wilcut n

author keywords: absorbance; bioassay; glyphosate resistance; herbicide resistance; leaf dip; leaf disc; shikimate
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
13. Climate Action (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2005 journal article

Assessment of two nondestructive assays for detecting glyphosate resistance in horseweed (Conyza canadensis)

WEED SCIENCE, 53(5), 559–566.

By: C. Koger*, D. Shaner*, W. Henry *, T. Nadler-Hassar*, W. Thomas n & J. Wilcut n

author keywords: absorbance; bioassay; glyphosate resistance; herbicide resistance; leaf dip; leaf disc; shikimate
TL;DR: Two rapid, nondestructive assays were developed and tested for their potential in differentiating glyphosate-resistant from glyphosate-susceptible biotypes of horseweed and might have utility for screening other weed populations for resistance to glyphosate. (via Semantic Scholar)
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
13. Climate Action (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2005 journal article

Effects of glyphosate application timing and rate on sicklepod (Senna obtusifolia) fecundity

WEED TECHNOLOGY, 19(1), 55–61.

By: W. Thomas*, W. Pline-Srnic, R. Viator* & J. Wilcut*

author keywords: Alexander stain; pollen viability; tetrazolium chloride
TL;DR: The number of flowers produced was limited by glyphosate treatment due to flower abscission, pollen viability measurements could not be analyzed because of large numbers of missing data points, and significant differences among the treatments were found for average pod length, 50-seed weight, seed germination, seed viability, and aboveground biomass. (via Semantic Scholar)
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
13. Climate Action (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2005 journal article

Rice (Oryza satiova) response to drift rates of glyphosate

Pest Management Science, 61(12), 1161–1167.

By: C. Koger, D. Shaner, L. Krutz, T. Walker, N. Buehring, W. Henry, W. Thomas, J. Wilcut

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

2005 journal article

Uptake, translocation, and metabolism of sulfentrazone in peanut, prickly sida (Sida spinosa), and pitted morningglory (Ipomoea lacunosa)

WEED SCIENCE, 53(4), 446–450.

By: W. Thomas n, S. Troxler n, W. Smith n, L. Fisher n & J. Wilcut*

author keywords: metabolism; selectivity; tolerance
TL;DR: Tolerance in peanut is largely due to its ability to rapidly metabolize sulfentrazone, with peanut being the most tolerant of the three species, whereas prickly sida and pitted morningglory are moderately tolerant and completely susceptible to sulfentazone, respectively. (via Semantic Scholar)
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
13. Climate Action (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2005 journal article

Yield and physiological response of flue-cured tobacco to simulated glyphosate drift

WEED TECHNOLOGY, 19(2), 255–260.

By: I. Burke n, W. Thomas n, W. Pline-Srnic*, L. Fisher n, W. Smith n & J. Wilcut n

author keywords: crop injury; herbicide assay; shikimate
TL;DR: Glyphosate rates of 140 g/ha (0.125 of recommended rate) or higher resulted in significant crop injury, reduced tobacco yield, and decreased leaf grade index; however, in-season data are needed to correlate shikimic acid accumulation with yield loss. (via Semantic Scholar)
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
3. Good Health and Well-being (OpenAlex)
13. Climate Action (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2005 journal article

Yield and physiological response of nontransgenic cotton to simulated glyphosate drift

WEED TECHNOLOGY, 19(1), 35–42.

By: W. Thomas*, I. Burke*, B. Robinson*, W. Pline-Srnic, K. Edmisten*, R. Wells*, J. Wilcut n

author keywords: shikimic acid
TL;DR: Investigation of nontransgenic cotton to simulated glyphosate drift in a weed-free environment found visual injury and shikimic acid accumulation at 7 d after EPOST treatment might be used as a diagnostic indicator to predict potential yield reductions from simulated glyphosate Drift. (via Semantic Scholar)
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
13. Climate Action (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2004 journal article

Glufosinate does not affect floral morphology and pollen viability in glufosinate-resistant cotton

WEED TECHNOLOGY, 18(2), 258–262.

By: W. Thomas n, W. Pline*, J. Wilcut n, K. Edmisten n, R. Wells n, R. Viator n, M. Paulsgrove*

author keywords: glyphosate; herbicide-resistant crops; transgenic crops
TL;DR: The distance from the top anther to the tip of the stigma was less in plants treated with an eight-leaf POST treatment than in nontreated plants, although this difference is not likely to influence pollen deposition because in both cases anthers reached above the stigma tip. (via Semantic Scholar)
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
13. Climate Action (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2004 journal article

Glyphosate negatively affects pollen viability but not pollination and seed set in glyphosate-resistant corn

WEED SCIENCE, 52(5), 725–734.

By: W. Thomas n, W. Pline-Srnic*, J. Thomas n, K. Edmisten n, R. Wells n & J. Wilcut n

author keywords: Alexander stain; fluorochromatic reaction; pollen viability; GA21; NK603; mEPSPS; CP4-EPSPS; ELISA
TL;DR: Although pollen viability and pollen production were reduced in glyphosate treatments after V6, no effect on kernel set or yield was found among any of the reciprocal crosses in the phytotron or field studies and there were also no yield differences among the hand self-pollinated (nontreated male × nontreated female, etc.) crosses. (via Semantic Scholar)
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
13. Climate Action (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2004 journal article

Tropic croton interference in peanut

WEED TECHNOLOGY, 18(1), 119–123.

By: W. Thomas*, S. Askew* & J. Wilcut n

author keywords: competition; economic threshold; models; plant height; weed biomass; weed density
TL;DR: The results show that tropic croton is less competitive than many broadleaf weeds in peanut, it has potential to substantially reduce yields and subsequently reduce economic return. (via Semantic Scholar)
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
13. Climate Action (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2004 journal article

Weed efficacy evaluations for bromoxynil, glufosinate, glyphosate, pyrithiobac, and sulfosate

WEED TECHNOLOGY, 18(2), 443–453.

By: J. Corbett n, S. Askew n, W. Thomas n & J. Wilcut n

author keywords: herbicide-resistant crops; nonselective herbicides; AMACH; AMAPA; AMARE; AMBEL; ARAHY; BRAPP; CASOB; CHEAL; CYPES; DATST; DEDTO; DIGSA; ELEIN; IPOHE; IPOHG; IPOLA; PANDI; PANTE; PHBPU; POLPE; POLPY; SEBEX; SETFA; SETLU; SETVI; SIDSP; SORHA; XANST; ZEAMA
TL;DR: Postemergence weed control was evaluated in field trials and in greenhouse research, goosegrass could be controlled with glufosinate POST plus a late POST-directed treatment of prometryn plus monosodium salt of methylarsonic acid. (via Semantic Scholar)
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
13. Climate Action (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2004 journal article

Weed management in glyphosate-resistant corn with glyphosate and halosulfuron

WEED TECHNOLOGY, 18(4), 1049–1057.

By: W. Thomas n, I. Burke n & J. Wilcut n

author keywords: diammonium salt; isopropylamine salt; net returns
TL;DR: Three field studies were conducted at Lewiston Woodville, NC, in 2001 and 2002 to evaluate crop tolerance, weed control, grain yield, and net returns in glyphosate-resistant corn with various herbicide systems. (via Semantic Scholar)
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
13. Climate Action (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2004 journal article

Weed management in glyphosate-resistant corn with glyphosate, halosulfuron, and mesotrione

WEED TECHNOLOGY, 18(3), 826–834.

By: W. Thomas n, I. Burke n & J. Wilcut n

author keywords: diammonium salt; isopropylamine salt; net returns
TL;DR: Four field studies were conducted at the Peanut Belt Research Station near Lewiston Woodville, NC, in 2000, 2001, and 2002 to evaluate crop tolerance, weed control, grain yield, and net returns in glyphosate-resistant corn with various herbicide systems. (via Semantic Scholar)
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science; OpenAlex)
13. Climate Action (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2003 journal article

Influence of environmental factors on after-ripened crowfootgrass (Dactyloctenium aegyptium) seed germination

WEED SCIENCE, 51(3), 342–347.

By: I. Burke n, W. Thomas n, J. Spears n & J. Wilcut*

author keywords: alternating temperature; pH; scarification; water stress; weed biology
TL;DR: The data suggest that crowfootgrass may emerge later in the season with warmer temperatures and after a precipitation event, and may emerge rapidly. (via Semantic Scholar)
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
13. Climate Action (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2003 journal article

Influence of environmental factors on broadleaf signalgrass (Brachiaria platyphylla) germination

WEED SCIENCE, 51(5), 683–689.

By: I. Burke n, W. Thomas n, J. Spears n & J. Wilcut n

author keywords: scarification; solution pH; water stress
TL;DR: The data suggest that broadleaf signalgrass may emerge later in the season, after rains, and could germinate rapidly and in high numbers, as well as contribute to poor control later inThe season by soil-applied herbicides or allow broad leaf signalgrass to emerge after final postemergence treatments were made. (via Semantic Scholar)
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
6. Clean Water and Sanitation (OpenAlex)
13. Climate Action (Web of Science)
Source: Web Of Science
Added: August 6, 2018

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