Alyssa M Koehler

Works (9)

Updated: July 29th, 2023 21:14

2021 article

Nondestructive Sampling to Monitor Macrophomina phaseolina Root Colonization in Overwintering Stevia

PLANT HEALTH PROGRESS, Vol. 22, pp. 151–153.

By: L. Rogers n & A. Koehler*

author keywords: Stevia rebaudiana; perennial; disease monitoring; Botryosphaeriaceae; charcoal rot
TL;DR: N nondestructive root soil-core sampling was conducted during overwintering months, from October 2018 to January 2020, to monitor M. phaseolina root colonization in stevia in Rocky Mount, NC, and found that October samplings can predict survival and vigor of reemergingstevia plants. (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: September 13, 2021

2019 journal article

Effects of fungicide applications on root-infecting microorganisms and overwintering survival of perennial stevia

Crop Protection, 120, 13–20.

By: A. Koehler* & H. Shew n

author keywords: Soilborne fungi; Stevia; Overwintering survival; Fungicide trials
TL;DR: This study is one of the first to evaluate interactions between fungicide use and root associated fungi in a perennial crop and provides a framework to further investigate the role of root-associated fungi in overwintering survival of perennial stevia. (via Semantic Scholar)
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
15. Life on Land (OpenAlex)
Sources: Web Of Science, Crossref
Added: May 6, 2019

2019 journal article

Identification and characterization of Septoria steviae as the causal agent of Septoria leaf spot disease of stevia in North Carolina

Mycologia, 111(3), 456–465.

By: A. Koehler*, M. Larkin n, L. Rogers n, I. Carbone n , M. Cubeta n  & H. Shew  n

author keywords: Ascomycete; morphological characterization; phylogenetics; Stevia rebaudiana
MeSH headings : Ascomycota / genetics; Ascomycota / pathogenicity; DNA, Fungal / genetics; DNA, Ribosomal Spacer / genetics; North Carolina; Phylogeny; Plant Diseases / microbiology; Plant Leaves / microbiology; RNA, Ribosomal, 5.8S / genetics; Sequence Analysis, DNA; Stevia / microbiology
TL;DR: This study represents the first genetic characterization of S. steviae in the United States and provides an experimental framework to elucidate the genetic diversity and disease ecology of field populations of S.'svia rebaudiana. (via Semantic Scholar)
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
15. Life on Land (OpenAlex)
Sources: Web Of Science, NC State University Libraries, Crossref
Added: May 13, 2019

2018 journal article

Field efficacy and baseline sensitivity of Septoria steviae to fungicides used for managing Septoria leaf spot of stevia

CROP PROTECTION, 109, 95–101.

By: A. Koehler n & H. Shew n

author keywords: Fungal pathogens; Fungicide efficacy; Fungicide baseline
TL;DR: Field efficacy and baseline sensitivity of Septoria steviae to fungicides used for managing Septoria leaf spot of stevia, an herbaceous perennial emerging as a new crop in the southeastern US, are studied. (via Semantic Scholar)
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UN Sustainable Development Goal Categories
Source: Web Of Science
Added: August 6, 2018

2017 journal article

Enhanced Overwintering Survival of Stevia by Qol Fungicides Used for Management of Sclerotium rolfsii

PLANT DISEASE, 101(8), 1417–1421.

By: A. Koehler n & H. Shew n

MeSH headings : Ascomycota; Fungicides, Industrial / standards; North Carolina; Plant Diseases / microbiology; Stevia / microbiology; Stevia / physiology; Survival Analysis
TL;DR: Stevia (Stevia rebaudiana) is a herbaceous perennial under evaluation as a new crop in the southeastern United States and fungicides evaluated included azoxystrobin, flutolanil, and tebuconazole applied at three timings enhanced overwintering survival. (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)
Source: Web Of Science
Added: August 6, 2018

2017 article

First Report of Charcoal Rot of Stevia Caused by Macrophomina phaseolina in North Carolina

Koehler, A. M., & Shew, H. D. (2018, January). PLANT DISEASE, Vol. 102, pp. 241–241.

By: A. Koehler n & H. Shew n

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

2017 journal article

First report of pythium root rot of stevia caused by Pythium myriotylum, P. irregulare, and P. aplzanidermatum in North Carolina

Plant Disease, 101(7), 1331–1332.

By: A. Koehler, E. Lookabaugh, B. Shew & H. Shew

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

2017 journal article

Seasonal dynamics and fungicide sensitivity of organisms causing brown patch of tall fescue in North Carolina

MYCOLOGIA, 109(4), 667–675.

By: A. Koehler n & H. Shew  n

author keywords: Binucleate Rhizoctonia; Thanatephorus cucumeris; turfgrass; Waitea circinata var. zeae
MeSH headings : Basidiomycota / classification; Basidiomycota / drug effects; Basidiomycota / isolation & purification; DNA, Fungal / genetics; DNA, Ribosomal Spacer / genetics; Festuca / microbiology; Fungicides, Industrial / pharmacology; Microbial Sensitivity Tests; North Carolina; Plant Diseases / microbiology; Rhizoctonia / classification; Rhizoctonia / drug effects; Rhizoctonia / genetics; Rhizoctonia / isolation & purification; Seasons
TL;DR: Sensitivity of the May 2014 isolates to multiple concentrations of the fungicides azoxystrobin, flutolanil, fluxapyroxad, and propiconazole was compared with sensitivity of isolates collected in 2003, to determine whether multiple years of exposure to fungicides applied for brown patch control had altered fungicide sensitivity. (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

2014 article

First Report of Stem Rot of Stevia Caused by Sclerotinia sclerotiorum in North Carolina

Koehler, A., & Shew, H. (2014, October). PLANT DISEASE, Vol. 98, pp. 1433–1433.

By: A. Koehler n & H. Shew n

TL;DR: Diseased plants were observed in several counties in the state in fields that had been planted primarily in a corn-soybean rotation prior to stevia planting, and symptoms included wilting, chlorotic leaves, necrotic leaves at the base of the stem, bleached stem lesions, and dead plants. (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)
Source: Web Of Science
Added: August 6, 2018

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