A5000456081- Plant Virus Research Studies
- Insect-Plant Interactions and Control
- Cocoa and Sweet Potato Agronomy
- Plant Pathogenic Bacteria Studies
- Plant Disease Resistance and Genetics
- Nematode management and characterization studies
- Agricultural Innovations and Practices
- Plant Pathogens and Resistance
- Plant and Fungal Interactions Research
- Pharmaceutical and Antibiotic Environmental Impacts
- Effects and risks of endocrine disrupting chemicals
- Plant Disease Management Techniques
- Plant Parasitism and Resistance
- Insect and Pesticide Research
- Plant tissue culture and regeneration
- Plant and animal studies
- Insect Pest Control Strategies
- Forest Insect Ecology and Management
- Agricultural pest management studies
- Agricultural Practices and Plant Genetics
- Agronomic Practices and Intercropping Systems
- Potato Plant Research
- Insect behavior and control techniques
- Organic Food and Agriculture
- Banana Cultivation and Research
University of Arkansas at Fayetteville
2023
Epsom Hospital
2022
University of Greenwich
2007-2019
Natural Resources Institute
2006-2019
Makerere University
1998-2019
International Potato Center
2011-2019
Health and Safety Executive
2019
Universidad Nacional Autónoma de México
2007-2014
Australian Centre for International Agricultural Research
2013
International Potato Center
1998-2013
SUMMARY Glandular hairs occur abundantly on Solanum polyadenium, S. tarijense and berthaultii. An exudate is discharged from the glandular hair when an aphid mechanically ruptures cell walls. On contact with atmospheric oxygen, a chemical reaction initiated in which clear, water‐soluble material contained changes to black insoluble precipitated aphid's limbs. This initially impedes its movements further accumulations eventually stick aphids plant so that they are immobilized starve death. In...
Sweet potato virus disease (SPVD) is the name used to describe a range of severe symptoms in different cultivars sweet potato, comprising overall plant stunting combined with leaf narrowing and distortion, chlorosis, mosaic or vein‐clearing. Affected plants various were collected from several regions Uganda. All samples contained aphid‐borne feathery mottle potyvirus (SPFMV) almost all whitefly‐borne chlorotic stunt closterovirus (SPCSV). SPCSV was detected by mix monoclonal antibodies (MAb)...
The occurrence of intersex fish in a number European rivers has been attributed to exposure estrogenic chemicals present sewage treatment work (STW) effluents. To further understand the environmental fate these contaminants, activity effluents, water, and sediments were investigated both upstream downstream major STW discharge two United Kingdom rivers. Estrogenic activity, determined using yeast estrogen-receptor transcription screen, effluents on was similar, ranging from 1.4 2.9 ng...
Fig. 1.The 12 African countries with an annual sweet potato production (×10 3 ) exceeding 100,000 t (21).Note the main area concentrated around Lake Victoria (in black).
Most effluents from wastewater treatment works (WwTWs) contain estrogenic chemicals that include steroidal estrogens and xenoestrogens. We investigated the nature of mixtures contaminants taken up by two species fish exposed to WwTWs effluents. Sexually immature rainbow trout, Oncorhynchus mykiss, sexually mature roach, Rutilus rutilus, were tap water, river or one for 10 days, when sacrificed tissues removed chemical analysis. Estrogenic in bile gonads hydrolyzed, concentrated solid-phase...
Summary Symptomless sweet potato ( Ipomoea batatas ) plants obtained from farmers' fields in each of the main growing regions Uganda were tested by nitro‐cellulose membrane enzyme‐linked immunosorbent assays (NCM‐ELISA) for feathery mottle virus (SPFMV), mild (SPMMV), chlorotic fleck (SPCFV), latent (SPLV), C‐6 (C‐6) and caulimo‐like (SPCa‐LV). Most gave negative reactions all NCM‐ELISA, only c. 5% giving positive to SPFMV c 1% SPMMV or SPCFV. Graft inoculations cuttings symptomless plants,...
Effluents from wastewater treatment works (WwTWs) contain estrogenic substances that induce feminizing effects in fish, including vitellogenin (VTG) synthesis and gonadal intersex. Fish vary their responsiveness to effluents, but the physiological basis for these differences are not known. In this study, uptake of estrogen two WwTW effluents (measured hydrolyzed bile) response (VTG induction) were compared a salmonid (rainbow trout, Onchorhynchus mykiss) cyprinid fish (roach, Rutilus...
SUMMARY The pyrethroid, deltamethrin, alone or as an emulsifiable formulation, hindered infection of healthy plants with the persistent beet mild yellowing virus (BMYV) and both acquisition of, with, non‐persistent potato Y (PVY) semi‐persistent sugar yellows (BYV) by Myzus persicae in glasshouse tests. Another RU‐15525, also protected against PVY. Even sub‐lethal amounts deltamethrin decreased transmission rapidly incapacitating aphids, effect being least aphids most resistant to...
Journal Article Feeding and Mobility of the Potato Leafhopper Impaired by Glandular Trichomes Solanum berthaultii S. polyadenium Get access Ward M. Tingey, Tingey Search for other works this author on: Oxford Academic PubMed Google Scholar Richard W. Gibson Economic Entomology, Volume 71, Issue 6, 1 December 1978, Pages 856–858, https://doi.org/10.1093/jee/71.6.856 Published: 01 1978 history Received: 09 June
Exposure of fish to wastewater treatment works (WwTWs) effluents can result in reproductive anomalies consistent with exposure estrogenic compounds. However, UK WwTWs also contain compounds androgen receptor activities which may contribute dysfunction fish. A toxicity identification and evaluation (TIE) approach was used profile (anti)androgenic bile exposed two effluents. Extracts from effluent were fractionated by liquid chromatography tested for activity using a yeast transcription screen...
Summary Mosaic disease (MD) is more severe in cassava plants infected within the area of current epidemic northern and central Uganda than to south affected area. This difference severity was recorded a single cultivar as well amongst mixtures cultivars found commonly farmers' fields. An increase also occurred passed through localities. Varietal or agroecological factors coincident with are therefore unlikely cause increased severity. The could be graft cutting transmitted super‐infect...