Theophilus Kwabla Tengey

ORCID: 0000-0003-2822-878X
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Research Areas
  • Agricultural pest management studies
  • Mycotoxins in Agriculture and Food
  • Peanut Plant Research Studies
  • Genetic and Environmental Crop Studies
  • Agronomic Practices and Intercropping Systems
  • Plant Disease Resistance and Genetics
  • Soybean genetics and cultivation
  • Banana Cultivation and Research
  • Plant Disease Management Techniques
  • Plant Virus Research Studies
  • Plant Pathogenic Bacteria Studies
  • Agricultural Innovations and Practices
  • Cocoa and Sweet Potato Agronomy
  • Crop Yield and Soil Fertility
  • Soil Carbon and Nitrogen Dynamics
  • Plant Pathogens and Resistance
  • Legume Nitrogen Fixing Symbiosis
  • Plant-Microbe Interactions and Immunity
  • Plant tissue culture and regeneration
  • Economics of Agriculture and Food Markets
  • Seed and Plant Biochemistry
  • Seed Germination and Physiology
  • Environmental DNA in Biodiversity Studies
  • Animal and Plant Science Education
  • Plant and animal studies

Council for Scientific and Industrial Research
2021-2024

Texas Tech University
2018-2022

Despite sustained efforts to promote climate-smart technologies in Sub-Saharan Africa (SSA), adoption remains low. At the same time, downside risks associated with climate change and food insecurity are becoming acute. Improved cowpea varieties contribute nutrition security. Limited evidence exists, however, regarding how attributes influence adoption. We use a discrete choice experiment investigate farmers' preferences mean willingness pay (WTP) for variety attributes. Our results show that...

10.1080/17565529.2021.1889949 article EN cc-by Climate and Development 2021-03-23

The study of the variations in Macrophomina phaseolina, causal agent charcoal rot, is critical understanding ecology isolates and epidemiology diseases they cause. This sought to identify characterize M. phaseolina using both molecular morphological approaches determine virulence isolates. was isolated from cowpea-diseased stem tissues. Eleven major cowpea growing areas (Manga, Nyankpala, Yendi, Damongo, Tumu, Wa, Akomadan Ejura) were morphologically molecularly characterized. DNA amplified...

10.1080/07060661.2024.2387707 article EN cc-by Canadian Journal of Plant Pathology 2024-08-30

Aflatoxin contamination is a global menace that adversely affects food crops and human health. Peanut seed coat the outer layer protecting cotyledon both at pre- post-harvest stages from biotic abiotic stresses. The aim of present study to investigate role against A. flavus infection. In-vitro colonization (IVSC) with without showed acts as physical barrier, developmental series peanut formation robust multilayered protective coat. Radial growth bioassay revealed insoluble soluble extracts...

10.3390/jof7121000 article EN cc-by Journal of Fungi 2021-11-23

The introduction of invasive insect pests across national borders has become a major concern in crop production. Accordingly, plant protection organizations are challenge to reinforce their monitoring strategies, which hampered by the weight and size inspection equipment, as well taxonomic extensiveness interrupted species. Moreover, some that impede farmer productivity profitability difficult for researchers address on time due lack appropriate measures. Farmers' reliance synthetic...

10.4236/ojapps.2024.143048 article EN Open Journal of Applied Sciences 2024-01-01

Aflatoxin caused by Aspergillus flavus is a major field to storage contaminant in groundnut seed production, whereas defoliation diseases Passalora arachidicola and Nothopassalora personata are two of the most yield-limiting biotic stresses. The present study was identify genotypes with resistance leaf spot disease preharvest aflatoxin contamination. Thirty-three originating from crosses between Schubert × 43-09-03-02 TS32-1 60-02-03-02 including three checks: Manipinta, Chinese ICGV03401...

10.4314/afsjg.v16i1.1 article EN Agricultural and Food Science Journal of Ghana 2024-09-06

Wood vinegar (WV) is a biostimulant and biopesticide that contains pyroligneous acid used as crop growth enhancer biocontrol agent, but insufficient information exists on WV’s effects soil quality cowpea production in Ghana. A field study (2 years) was conducted to determine the appropriate method of applying WV for health production, economic benefits WV. Assessments were nodulation, shoot biomass, yield, value–cost ratio, enzymes, respiration, microbial biomass nitrogen (MBN),...

10.3390/agronomy13102497 article EN cc-by Agronomy 2023-09-28

Introduction This case study reports on how a gender responsive breeding program contributes to meeting the trait preference of men and women for improved cowpea varieties in northern Ghana. Methods Fifty-eight early-maturing, medium-maturing dual-purpose lines were planted at CSIR-SARI research fields farmers invited participatory plant (PPB) 2016. Selected from PPB further evaluated 2017 using varietal selection (PVS) 5 districts In addition, 20 focus group discussions (FGDs) held 2018 10...

10.3389/fsoc.2023.1260407 article EN cc-by Frontiers in Sociology 2023-10-12

Callosobruchus maculatus is an important field-to-store pest that causes close to 100% losses in stored produce. This study aimed at assessing the resistance of cowpea genotypes C. infestation. Thirteen advanced breeding lines pre-selected on basis their high grain yield, and three released varieties (Padi-tuya, Kirkhouse Benga Wangkae) were evaluated a no-choice experiment. The experiment was laid out completely randomized design with four replications under laboratory conditions. Data...

10.1080/15427528.2022.2092573 article EN cc-by Journal of Crop Improvement 2022-07-04

Aflatoxin contamination poses serious health concerns to consumers of peanut and products. This study aimed at investigating the response peanuts Aspergillus flavus infection aflatoxin accumulation. Isolates A. were characterised either as aflatoxigenic or non-aflatoxigenic using multiple cultural techniques. The selected isolates used in an vitro seed colonisation (IVSC) experiment on two flavus-resistant susceptible genotypes. Disease incidence, severity, accumulation measured. Genotypes...

10.3390/toxins14080536 article EN cc-by Toxins 2022-08-05

Social Impact Statement The use of neglected and underutilized species (NUS) in agrosystems is a potential solution to the challenges arising from global change. These could contribute equitable diversification agricultural systems. Providing knowledge on their genetic diversity fostering access data results essential for development strong collaborative future research. study addressed these issues by assessing largest fonio ( Digitaria exilis ) collection existing date. Associated with...

10.1002/ppp3.10424 article EN cc-by-nc-nd Plants People Planet 2023-09-03

Prolonged drought of cowpea at the seedling stage can affect survival and productivity. This study sought to evaluate genotypes for their resistance seedling-stage stress. Fifteen were used in this study. The experiment was a factorial arranged Completely Randomized Design with three replications. Drought stress imposed 4 weeks after full expansion first trifoliate leaf. Soil Plant Analysis Development (SPAD) chlorophyll meter readings unifoliate, first, second leaves each genotype measured...

10.1080/23311932.2023.2212463 article EN cc-by Cogent Food & Agriculture 2023-05-19

International Journal of Plant Pathology 4 (1): 9-22, 2013 ISSN 1996-0719/DOI:10.3923/ijpp.2013.9.22 C Kowledgeia Review, Malaysia

10.3923/ijpp.2013.9.22 article EN International Journal of Plant Pathology 2012-12-15

Aflatoxins, which have been classified as a group-1 carcinogen are the well-known mycotoxins produced by Aspergillus flavus. Aflatoxins linked to liver diseases, acute hepatic necrosis, resulting in cirrhosis or hepatocellular carcinomas due it incurs loss of value international trade for peanuts contaminated with it. The four main aflatoxins B1, B2, G1, and G2 B1 is predominant. In plants, cell wall primary barrier against pathogen invasion. Cell fortifications such deposition callose,...

10.20944/preprints201808.0292.v1 preprint EN 2018-08-16

Abstract Genetic diversity analysis is pivotal for optimizing the use of genetic resources and deploying conservation strategies in face global changes. This important essential indigenous species often neglected by research. research was carried out to examine pattern structure among fonio ( Digitaria exilis (Kippist) Stapf) accessions Ghana. Following farmer surveys collection efforts key fonio-growing regions Ghana, we amassed a comprehensive 176 from 165 farmers across 24 communities....

10.1007/s10722-024-01974-9 article EN cc-by Genetic Resources and Crop Evolution 2024-04-17

Abstract Cowpea is an important staple in Ghana and many tropical subtropicalregions. Improving food security agricultural sustainability for these crops requires the development of climate-resilient varieties.This study aimed to classify five newly developed cowpea varieties— Bawutawuta , SAMPEA 14 SARI-tuya IT13K-1070–2 IT07K-299–6— using Near Infrared Spectroscopy (NIRS) classification, while standard methods were used evaluate their composition, functional physico-mechanical properties....

10.1007/s44403-024-00004-x article EN cc-by Food, Nutrition and Health. 2024-10-24

Maize is in high demand due to its significant contribution food security and income generation.However, Ghana, production adversely affected by low soil fertility fall armyworm (FAW) infestation.The application of fertilizers sound FAW control could contribute increased maize yield the country.This study was conducted determine effect nitrogen fertilizer rates pesticide on growth maize.The experiment involved four levels (No N-fertilizer, N-fertilizer at 40 kg•ha -1 , 60 80 ,N-fertilizer...

10.4236/oalib.1110632 article EN OALib 2023-01-01

Aphids possess flexible life cycles and are therefore capable of acclimatizing to various environmental changes.Their physiological, biochemical, behavioral responses can easily withstand a wide range biotic abiotic stressors.This adaptability trait, however, appears be highly dependent on the specific aphid species crop types varieties.Drought stress alter chemical composition host plants, which have positive or negative effects performance in some cases no effect.Plants also contain...

10.4236/oalib.1110633 article EN OALib 2023-01-01

The on-farm mother–baby trial experimental approach was employed to evaluate the performance of elite groundnut genotypes on farmers’ fields in Guinea savannah agroecology Ghana 2020 and 2021 cropping seasons. Analysis data from mother revealed significant (p < 0.05) genotypic differences for traits measured over two years. genotype ICGV-IS 13842 reached physiological maturity 88 days identified as with shortest period. However, terms pod yield its associated components, 13864 emerged...

10.3390/agriculture13122249 article EN cc-by Agriculture 2023-12-07

A study to screen F2 populations obtained from IT10K-837-1 x Sanzi for resistance M. sjostedti. total of 351 plants were screened under field conditions and each line rated visually thrips damage score, flower abortion rate, number pods per plant flower. The was conducted during the 2020 cropping seasons where seeds planted conditions. Thrips plant, bloom all scored accession. data laboratory analyzed using GENSTAT edition 12 determine if there any major variations among cowpea genotypes....

10.9734/jeai/2023/v45i22104 article EN Journal of Experimental Agriculture International 2023-02-22
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