Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 19 of 19 for “"sex pheromones"”.
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Behavioural responses of cocoa mirids, Sahlbergella singularis Hagl and Distantiella theobroma Dist. (Heteroptera: Miridae), to sex pheromones.
… to determine the potential for use of mirid sex pheromone trapping as an alternative, environmentally-acceptable method of managing the mirids. Based on the behavioural responses of the mirids to pheromones in traps, parameters were standardised for efficient performance of the traps. A range …
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Chemical communication and its ecological consequence in the Lysmata shrimp
… successfully. Mate recognition depends mainly on sex pheromones, which are detected by antennae and antennules. Distance (soluble)pheromone mediates mating behaviour of some decapod crustaceans. Contact pheromone (an insoluble coating on the body surface) has been proposed but not confirmed to be …
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Insect pheromones : the synthesis of the sex pheromone of Cryptoplebia leucotreta Meyr. and related compounds
The concept of pheromones is briefly expounded leading on to a discussion of the identified sex pheromones in the order Lepidoptera. The relationship between the structures Of these compounds and their biological activity is reviewed. A brief introduction to the sexual biology of tbe false codling …
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The chemical diversity of midge pheromones
… valuable agricultural crops. The female sex pheromones of several midge species have been identified and the hypothesis was that midge sex pheromones could be chemically more diverse in structure than previously thought. This hypothesis was tested in the context of four midge species of …
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Investigations into insect chemistry
… Wilson, in a review, described two classes of pheromones and related stimuli, those termed ‘releasers’ and ‘primers,’ in which the releaser pheromone elicits an immediate behavioral response upon reception, and the primer pheromone causes physiological changes which ultimately result in a …
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Mounting Sex Pheromone: A Novel Pheromone Responsible for Mate Recognition in the Ixodidae
… was demonstrated to be the cuticular contact sex pheromone of <em>Dermacentor variabilis</em>. This pheromone which has been termed the Mounting Sex Pheromone (MSP) was also demonstrated to be present on the surface of <em>D</em>. <em>andersoni</em>, <em>Amblyomma maculatum</em> and <em>A. …
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Identification and Functional Characterization of Sesquiterpene Pheromone Biosynthetic Genes in Stink Bugs (Pentatomidae)
… United States and globally. The aggregation or sex pheromones produced by these insects are known to be bisabolene-type sesquiterpenoids; however, the biosynthetic pathways in the formation of these pheromones are unknown. Here we provide evidence that Pentatomidae produce sesquiterpene …
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Pheromones in entomopathogenic nematodes: effects on dispersal and reproductive behaviours
… overall project aim is to explore the role of pheromones in coordinating a variety of important behaviours in entomopathogenic nematodes, particularly Steinernema, both as primers (longer term developmental effects) and releasers (short term behavioural effects). I investigate both sex …
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Pheromone chemistry and reproductive isolation in the subfamily Lamiinae (Coleoptera: Cerambycidae)
… components, even having identical attractant pheromones. For example, many cerambycines native to different continents use pheromones composed of hydroxyalkanones and related alkanediols. Avoidance mechanisms of interspecific attraction in cerambycines that share pheromone components include …
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Making Scents of Butterfly Pheromone Evolution
… are used in foraging, defence, and mating, and pheromones are particularly important to the lives of insects. These are chemical signals that mediate the behaviour of conspecifics. Chemical profiles therefore vary according to the ecological roles of their constituent compounds, as well as their …
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Surveillance of grape berry moth, Paralobesia viteana Clemens (Lepidoptera: Tortricidae), in Virginia vineyards
… that have implications for management. First, sex pheromone concentration in lures affected both target and non-target attraction to traps, while the blend of sex pheromones impacted attraction to P. viteana. Second, over the duration of study, 54 vineyard blocks were sampled for the pest in …
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Pheromones in Heliconius butterflies: Chemical ecology, genetics, and behaviour
Sex pheromones are chemical signals that mediate communication between males and females of a species and are important for mating. They have been well-studied in female moths, where females release volatile compounds to attract males over long distances. Butterflies fly during the day and were …
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Synthetic and ecological chemistry of natural products and analogues from sexually deceptive Chiloglottis orchids
… constraints on the evolution and speciation of sexually deceptive Chiloglottis orchids. Pollination by deception is a well documented phenomenon, particularly in the Orchidaceae, however only in recent decades has the chemical mimicry that so often drives these pollination syndromes become the …
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Synthetic and ecological chemistry of natural products and analogues from sexually deceptive Chiloglottis orchids
… constraints on the evolution and speciation of sexually deceptive Chiloglottis orchids. Pollination by deception is a well documented phenomenon, particularly in the Orchidaceae, however only in recent decades has the chemical mimicry that so often drives these pollination syndromes become the …
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Host plant associations and chemical ecology of Cerambycidae
… trade. Semiochemicals, particularly volatile pheromones, are an effective way to attract a number of cerambycid beetles to traps. The focus of my dissertation research was to evaluate current trapping methods and potential ways of optimizing these methods. I compiled a comprehensive list of …
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Chemical communication in cerambycid beetles and the molecular basis of olfaction
… mediated by long-range volatile aggregation or sex pheromones, but the pheromone chemistry is highly conserved, and many species of beetles produce and respond to identical compounds. This parsimony may yield powerful and efficient means to control species that are pests, but the full extent of …
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The circuit basis of olfactory mate recognition and localisation
… an appropriate partner and locating it. Sex pheromones are used in solving both tasks; they carry qualitative information to recognise, and positional information to locate a mate. How does the brain extract both a qualitative and a quantitative message from a single signal, like a …
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Mating Success in Low-Density Gypsy Moth Populations
… many regions of the world. The discovery of the sex pheromone disparlure (cis-7,8-epoxy-2-methyloctadecane) produced by females marked the start of a new era in the control and management of gypsy moth populations. Sex pheromones, like disparlure, have been used for detecting new populations, …
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Sex pheromone studies on the grass grub (Costelytra Zealandica (White)) and the common army worm
This thesis describes the identification of a sex pheromone of the grass grub beetle, Costelytra zealandica, and the attempts to use the sex pheromone directly to control grass grub infestations. The partial identification of a sex pheromone of the common armyworm moth, Pseudaletia separata, is …