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.
Results
Showing 1 to 14 of 14 for “"parasitoid wasps"”.
-
Understanding Virulence Mechanisms of Parasitoid Wasps of Drosophila: A Comparative Approach Across Clades
… of many <em>Drosophila</em> species encapsulate parasitoid wasps’ eggs to inhibit wasp development. Parasitoid wasps of the genus <em>Leptopilina</em> are known to produce extracellular vesicle (EV)-like secretions in their venom. Well-characterized in <em>L. heterotoma</em>, these vesicles kill …
-
Integrating Molecular, Ecological and Morphological Data to Explore the Biodiversity of Microgastrine Parasitoid Wasps
… explored in the context of the caterpillar and parasitoid inventory of the Area de Conservacion Guanacaste (ACG) in Costa Rica. To understand species relationships and patterns in host utilization, a phylogeny was reconstructed for Apanteles, the largest genus. A five-gene phylogeny recovered a …
-
The biological control of the red clover casebearer in New Zealand : A thesis submitted in partial fulfilment of the requirements for the Degree of Doctor of Philosophy at Lincoln University
… made by government science agencies to establish parasitoid wasps of these species. This programme was highly successful, resulting in the total suppression of clover casebearer seed pests in New Zealand, until the arrival of the red clover casebearer (C. deauratella) during 2016. This pest …
-
Taxonomy, phylogeny and resource use of Glyptapanteles (Hymenoptera: Braconidae, Microgastrinae), genus highly diversified in the Neotropics
Among hymenopteran parasitoid wasps, Ichneumonoidea is one of the superfamilies with the highest number of species and includes the highly diverse Microgastrinae subfamily. Microgastrinae wasps are very abundant and can be collected in many different terrestrial habitats. A considerable number of …
-
The Dynamics of Natural Enemy Resistance in Aphid Populations
… defensa</i> confers resistance to parasitism by parasitoid wasps due to the presence of the APSE bacteriophage in the <i>Hamiltonella</i> genome. Furthermore, pea aphids that harbour both <i>H. defensa</i> and PAXS endosymbionts are highly resistant to the parasitoid <i>Aphidius ervi</i>. Changes …
-
Barcoding alien invertebrates and biological control agents in South Africa, with a focus on the natural enemies of Thaumatotibia leucotreta (Meyrick)
… agents in South Africa; 2) sample T. leucotreta parasitoid wasps in organic and IPM orchards within the Western Cape; and 3) to determine the critical thermal limits of Trichogrammatoidea cryptophlebiae Nagaraja, an egg parasitoid used as a biological control agent against T. leucotreta, in the …
-
Toxin-like proteins in the venom of Drosophila parasitoids
<p>The figitid parasitoid wasps of Drosophila are gaining importance in agriculture due to their ability to kill the resilient soft-fruit pest Drosophila suzukii. Their success and infection strategies vary, and the mechanisms underlying these differences are largely unknown. Some of their venom …
-
The cabbage whitefly, aleyrodes Proletella: causes of outbreaks and potential solutions
… in field crops. These identified several parasitoid wasps and a coccinellid beetle, Clitostethus arcuatus. One of the parasitoids, Encarsia tricolor, and C. arcuatus were successfully cultured at NRI and tested in outdoor cage trials. In 2011, a multiple generation trial demonstrated the …
-
Learning and Olfactory Processing by the Parasitic Wasp, Cotesia Congregata, In Response to Concentration of Herbivore Related Tomato Volatiles
… a simple but effective mechanism to increase parasitoid foraging effectiveness. Hypotheses that learned attraction is dose dependent, that parasitoid wasps use elemental processing during learning, and that the concentration during learning of herbivore-related plant volatiles affects …
-
Molecular and genetic studies on a SipD/IpaD-related virulence spike protein from immune-suppressive particles of a Drosophila parasitoid
<p>Parasitoid wasps are effective biological control agents that have evolved intricate host immune suppression strategies to overcome host immune defenses. The most important anti-parasite defense mechanism is encapsulation, where the host’s blood cells surround the wasp egg. In the …
-
Revision of Xanthomicrogaster Cameron, 1911 (Hymenoptera: Braconidae: Microgastrinae)
… Braconidae) is one of the largest subfamilies of parasitoid wasps, both in terms of number of described species as well as estimated total number of species. Containing ~57 genera and exclusively attacking Lepidoptera, most of the diversity is concentrated within a few very large genera, with many …
-
Phylogenetics patterns of host utilization in two tropical Microgastrine parasitoid genera (Hymenoptera: Braconidae)
Parasitoid wasps play a pivotal role in maintaining the structure and dynamics of complex food webs. However, classical species sampling techniques such as malaise, light and yellow pan trapping, generally lack information regarding host utilization. Even within the species for which host data is …
-
Genotypic and endosymbiont-mediated variation in parasitoid susceptibility and other fitness traits of the potato aphid, <em>Macrosiphum euphorbiae</em>
… Despite an established role in conferring parasitoid resistance to <em>A. pisum</em> hosts, this study found very little evidence that <em>H. defensa</em> protects <em>M. euphorbiae</em> against one of its principal natural enemies, the parasitoid wasp <em>Aphidius ervi</em>. Instead the …
-
Unraveling the Vibrational Communication of Halyomorpha halys and the Insecticidal Impact on its Key Parasitoid Trissolcus japonicus: Implications for Integrated Pest Management and Biological Control
… assessed on Trissolcus japonicus, the main egg parasitoid of H. halys. The lethal effects on female parasitoids were investigated after exposure for 1, 6, and 24 hours to residues applied to Munger cells using a Potter spray tower to determine mortality levels. Additionally, sublethal effects …