Janet F Spears

Works (18)

Updated: July 5th, 2023 16:01

2014 journal article

Persistence of Benghal dayflower (Commelina benghalensis) in sustainable agronomic systems: Potential impacts of hay bale storage, animal digestion, and cultivation

Agroecology and Sustainable Food Systems, 38(3), 283–298.

By: M. Riar n, J. Spears n, J. Burns n, D. Jordan n, C. Zhang n & T. Rufty n

TL;DR: The results show the difficulty encountered when trying to control or eradicate Benghal dayflower in sustainable farming systems, as Cultivation is unlikely to be an effective control strategy during summer months, because soil temperatures are optimal for vegetative regeneration. (via Semantic Scholar)
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science; OpenAlex)
13. Climate Action (Web of Science)
Source: NC State University Libraries
Added: August 6, 2018

2007 journal article

Influence of environmental factors on cutleaf eveningprimrose (Oenothera laciniata) germination, emergence, development, vegetative growth, and control

WEED SCIENCE, 55(3), 264–272.

By: S. Clewis n, D. Jordan n, J. Spears n & J. Wilcut n

author keywords: light; temperature; pH; moisture stress; burial depth; growth and development; weed control
TL;DR: It is suggested that cutleaf eveningprimrose can germinate and gain biomass from early March to late October and could contribute to poor control before cotton planting if preplant control applications are delayed after early March. (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

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

Doveweed (Murdannia nudiflora) germination and emergence as affected by temperature and seed burial depth

WEED SCIENCE, 54(6), 1000–1003.

By: D. Wilson n, M. Burton n, J. Spears n & A. York*

author keywords: cominelinaceae; light; weed biology
TL;DR: Doveweed is becoming more common in agronomic crops in North Carolina and the effect of temperature and seed burial depth on doveweed germination and emergence may aid in developing tools and strategies for management. (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

Peanut response to inoculation and nitrogen fertilizer

Agronomy Journal, 97(1), 79–84.

By: J. Lanier, D. Jordan, J. Spears, R. Wells & P. Johnson

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

2005 journal article

Sicklepod (Senna obtusifolia) control and seed production after 2,4-DB applied alone and with fungicides or insecticides

WEED TECHNOLOGY, 19(2), 451–455.

By: S. Lancaster  n, D. Jordan n, J. Spears n, A. York n, J. Wilcut n, D. Monks n, R. Batts n, R. Brandenburg n

author keywords: pesticide interaction
TL;DR: Sicklepod control was highest when 2,4-DB was applied before flowering regardless of fungicide treatment, and Seed production and germination were reduced when 1,2-e-e was applied 81 to 85 d after emergence when sicklepod was flowering. (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

Disease management in overhead sprinkler and subsurface drip irrigation systems for peanut

AGRONOMY JOURNAL, 96(4), 1058–1065.

By: J. Lanier n, D. Jordan n, J. Barnes*, J. Matthews*, G. Grabow n, W. Griffin, J. Bailey n, P. Johnson n, J. Spears n, R. Wells n

TL;DR: Experiments were conducted to compare development of early leaf spot, pod yield, and market grade characteristics when peanut was grown under overhead sprinkler irrigation and subsurface drip irrigation and fungicides were not applied or applied biweekly or based on weather advisories. (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

Peanut response to planting pattern, row spacing, and irrigation

AGRONOMY JOURNAL, 96(4), 1066–1072.

By: J. Lanier n, D. Jordan n, J. Spears n, R. Wells n, P. Johnson n, J. Barnes*, C. Hurt n, R. Brandenburg n, J. Bailey n

TL;DR: Peanut pod yield was higher in standard twin row planting patterns than when grown in singleRow planting patterns in some but not all experiments, and less tomato spotted wilt was observed in standard or narrow twin Row planting patterns compared with single row planting pattern. (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 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

2002 journal article

Influence of prohexadione calcium on pod yield and pod loss of peanut

Agronomy Journal, 94(2), 331–336.

By: J. Beam*, D. Jordan*, A. York*, T. Isleib*, J. Bailey*, T. McKemie, J. Spears*, P. Johnson*

TL;DR: Excessive vegetative growth of peanut (Arachis hypogaea L.) can make digging and inverting operations less efficient, so increased combined yield noted following application of prohexadione Ca can be partially attributed to decreased pod loss. (via Semantic Scholar)
UN Sustainable Development Goal Categories
2. Zero Hunger (OpenAlex)
Source: NC State University Libraries
Added: August 6, 2018

2001 journal article

An evaluation of methods for breaking seed dormancy in kudzu (Pueraria lobata)

CANADIAN JOURNAL OF BOTANY-REVUE CANADIENNE DE BOTANIQUE, 79(2), 197–203.

By: D. Susko*, J. Mueller* & J. Spears*

author keywords: Pueraria lobata; physical dormancy; germination; phenology; acid scarification; warm stratification; cold stratification
TL;DR: The influence of temperature on germination percentages of seeds following dry heat treatments depended on the duration of exposure, and increased with longer exposures to dry heat and were greatest after 720 min (27 and 60%, respectively). (via Semantic Scholar)
UN Sustainable Development Goal Categories
15. Life on Land (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2001 journal article

Peanut response to prohexadione calcium in three seeding rate-row pattern planting systems

AGRONOMY JOURNAL, 93(1), 232–236.

By: D. Jordan n, J. Beam n, P. Johnson n & J. Spears n

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

2001 journal article

Virginia market-type peanut (Arachis hypogaea) cultivar tolerance and yield response to flumioxazin preemergence

WEED TECHNOLOGY, 15(1), 137–140.

By: J. Wilcut n, S. Askew*, W. Bailey*, J. Spears* & T. Isleib*

author keywords: disease interaction; Cylindrocladium crotalariae (Loos) Bell and Sobers; Cercospora arachidicola Hori; Cercosporidium personatum (Berk. and Curt.); Sclerotium rolfsii Sacc.; grade parameters; extra-large kernels; sound mature kernels; sound splits; total kernels; other kernels; fancy pods
TL;DR: Flumioxazin did not influence the incidence of early leaf spot, late Leaf spot, southern stem rot, cylindrocladium black rot, or tomato spotted wilt virus and did not affect percentage of extra-large kernels, sound mature kernels, other kernels, and total yield. (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

2000 journal article

Diclosulam does not influence yields in eight virginia market-type peanut (Arachis hypogaea) cultivars

WEED TECHNOLOGY, 14(2), 402–405.

By: W. Bailey*, J. Wilcut n, J. Spears*, T. Isleib* & V. Langston

author keywords: disease interaction; cylindrocladium black rot; Cylindrocladium crotalariae (Loos) Bell et Sobers; early leaf spot; Cercospora arachidicola Hori; late leaf spot; Cercosporidium personatum (Berk. et Curt.); southern stem rot; Sclerotium rolfsii Sacc.; tomato spotted wilt virus; grade parameters; extra large kernels; sound mature kernels; sound splits; total kernels; other kernels; fancy pods
TL;DR: Diclosulam did not affect percentage of extra large kernels, sound mature kernels, other kernels, and yield, and did not influence the incidence of early Leaf spot, late leaf spot, southern stem rot, cylindrocladium black rot, or tomato spotted wilt virus. (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

2000 journal article

Winter establishment of eastern gamagrass in the southern Piedmont

AGRONOMY JOURNAL, 92(6), 1184–1188.

By: J. Mueller n, T. Hall n, J. Spears n & B. Penny n

TL;DR: Planting in November, December, or January is an effective alternative to planting stratified seeds in May in the southern Piedmont, where its seeds exhibit a strong dormancy that reduce germination and successful stand establishment. (via Semantic Scholar)
UN Sustainable Development Goal Categories
15. Life on Land (Web of Science; OpenAlex)
Source: Web Of Science
Added: August 6, 2018

1997 journal article

Temperature during seed filling and soybean seed germination and vigour

Seed Science and Technology, 25(2), 233–244.

By: J. Spears, D. Tekrony & D. Egli

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

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