A5000780174- Insect Pheromone Research and Control
- Insect and Pesticide Research
- Insect-Plant Interactions and Control
- Insect Pest Control Strategies
- Insect behavior and control techniques
- Hemiptera Insect Studies
- Forest Insect Ecology and Management
- Insect Resistance and Genetics
- Plant and animal studies
- Insect and Arachnid Ecology and Behavior
- Cocoa and Sweet Potato Agronomy
- Essential Oils and Antimicrobial Activity
- Mosquito-borne diseases and control
- Entomopathogenic Microorganisms in Pest Control
- Trypanosoma species research and implications
- Metal complexes synthesis and properties
- Advanced Chemical Sensor Technologies
- Phytoplasmas and Hemiptera pathogens
- Date Palm Research Studies
- Crystal structures of chemical compounds
- Agricultural pest management studies
- Biological Control of Invasive Species
- Insect Utilization and Effects
- Geotechnical and Geomechanical Engineering
- Phytochemistry and Biological Activities
University of Greenwich
2016-2025
Natural Resources Institute
2016-2025
Louisiana Tech University
2020
Stellenbosch University
2001-2018
Tygerberg Hospital
2018
Kyushu University
2014
Imperial College London
2002
University of Cambridge
1989-1992
Bunkyo University
1991
Glenn Research Center
1990
Abstract In the Zambezi Valley of Zimbabwe, numbers Glossina morsitans Westwood and G. pallidipes Austen electrocuted on grids placed across their flight paths as they arrived at various natural synthetic odour sources demonstrated that ox comprises two broad fractions attractants. One fraction can be trapped by a charcoal filter and, in part, consists 1-octen-3-ol. A more volatile passes through carbon dioxide acetone. Levels acetone 1-octen-3-ol varied considerably, up to maxima 24 mg/h...
D. Hall and T. N. Waters, J. Chem. Soc., 1960, 2644 DOI: 10.1039/JR9600002644
Abstract In Zimbabwe, the catches of Glossina morsitans Westwood and G. pallidipes Austen in traps were increased by up to three times releasing 1-octen-3-ol at 0·05–50 mg/h or acetone 5–5000mg/h near traps, but some circumstances 5–50 reduced catches. Carbon dioxide 0·02–20 litres/min ten times. A mixture all chemicals 60 Each attracted both species flies from a distance; carbon also enhanced trap-entering alighting responses. Acetone with can increase several numbers that contact visual...
Abstract In Zimbabwe, catches of Glossina morsitans Westwood and G. pallidipes Austen in traps baited with acetone 1-octen-3-ol were increased by the addition synthetic mixture eight phenols found cattle urine to a level equal or greater than those natural urine. The did not increase further, indicating that account for essentially all attractiveness 4-Methylphenol 3- n -propylphenol shown be naturally-occurring components essential attractiveness, 2-methoxyphenol was reduce attractiveness....
Abstract The attractiveness of cattle urine to Glossina morsitans Westwood and G. pallidipes Austen was shown be entirely attributable the phenolic components which it contains. Four eight naturally occurring phenol derivatives (3- 4-methylphenol, 3-ethylphenol 3- n -propylphenol) were electroantennographically active, induced upwind flight in wind-tunnel bioassays increased trap catches field tests Zimbabwe. One minor components, 2-methoxyphenol, had little antennographic activity but...
Abstract Methods for dispensing tsetse attractants using sealed polyethylene sachets and bottles were studied in the laboratory field. 1-Octen-3-ol (octenol), 4-methylphenol 3- n -propylphenol dispensed singly or as blends from 25–200 cm 2 surface area with a wall thickness of 0.06–0.32 mm; butanone was bottles. The release rates attractants, assessed gravimetrically by GC analysis volatiles released, independent amount present. related directly to area, inversely increased exponentially...
Abstract The aim of this work was to determine the basis resistance in a sub-Saharan sweetpotato variety, New Kawogo, African weevil Cylas puncticollis. This insect feeds on roots, reducing quality and yield, is most important production constraint Africa. Laboratory bioassays were designed how performance weevils differed susceptible resistant roots. Subsequently, liquid chromatography-mass spectrometry (LC-MS) analysis root surface latex identified quantitative qualitative differences...
Several vicinal diols react rapidly with 6M-hydrogen bromide in acetic acid to afford acetoxy-bromides excellent yield. The mechanism, scope, and limitations of this reaction have been explored. Its mechanism involves monoacetylation the diol, cyclisation a 1,3-dioxolan-2-ylium ion, capture intermediate by ion. This has established kinetic studies, determination substrate stereospecificity, observation ions n.m.r. spectroscopy. preparative value is illustrated its application simple...
Abstract BACKGROUND Spotted wing drosophila, Drosophila suzukii (Matsumura) (Diptera: Drosophilidae), is an economically important pest of soft and stone fruit crops. The aim this study was to identify repellents, formulated in dispensers, which could protect crops from D. . Fourteen potential repellents were screened against summer‐ winter‐morph through electroantennography behavioural bioassays. Repellents effective the laboratory tested polytunnels determine their efficacy reducing...
Abstract Drosophila suzukii is a pest of soft and stone fruits that attracted to yeast volatile metabolites. has distinct summer winter morphs which are found in different habitats. Complex communities yeasts likely differ between habitats thus we hypothesized their attraction volatiles from species combinations species. We presented D. with isolation combinations, as either post-culture mixes or co-cultured, measured activity the flies laboratory choice tests Locomotor Activity Monitor...
Caffeine is a widely occurring plant defence chemical that occurs in the nectar of some plants, e.g. Coffea or Citrus spp., where it may influence pollinator behaviour to enhance pollination. Previous laboratory work found inexperienced bumblebees (Bombus terrestris) located new food sources emitting learned floral odour more consistently if they had been fed caffeine association with and reward. Inexperienced bees primed also made initial visits target robotic flowers odour, compared...
Helopeltis cinchonae is an emerging pest of tea and causes severe damage to plantations in China. The female H. has been reported produce a sex pheromone consisting two components, hexyl (3R)-3-acetoxybutyrate (5R)-1-acetoxy-5-butyroxyhexane, lures containing the synthetic compounds have shown attract male traps field. This first time that components identified for species bug, but their field application not evaluated detail. present study shows blend both loaded into polyethylene vial at...
Abstract In Zimbabwe, studies were made of the numbers tsetse ( Glossina spp.) and stable flies Stomoxys attracted to cattle different nutritional status, age sex. Host odours analysed determine physiological basis these differences improved methods are described for measuring rates production kairomones. Seasonal fluctuations in host weight, related changes pasture quality, had no significant effect on attraction or . However, both individuals carbon dioxide by strongly correlated with...
Seven resistant varieties of sweetpotato were compared with three susceptible in field trials and laboratory bioassays showed that resistance was an active process rather than escape mechanism, as also had reduced root damage oviposition the laboratory. Liquid chromatography-mass spectrometry (LC-MS) surface epidermal extracts significant variation concentration hexadecyl, heptadecyl, octadecyl, quinic acid esters caffeic coumaric acid, higher concentrations correlated resistance. All...