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Showing 1 to 20 of 37 for “"midge"”.
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The chemical diversity of midge pheromones
Midges (Diptera: Cecidomyiidae) are pests of many economically 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 …
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Material, acoustic, and mechanical properties of mosquito and midge antennae
… of the material properties of mosquito or midge antennae, to assess the material structure and to gauge which impact this distribution can have on the antenna's mechanical behaviour in response to sound. It was revealed that, rather than a simple beam of uniform cuticle, the antennae of the …
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Bionomics of the Cypress Twig Gall Midge, Taxodiomyia Cupressiananassa (o.s.) (Diptera: Cecidonyiidae), in Central Illinois
Made available in DSpace on 2014-12-11T18:05:44Z (GMT). No. of bitstreams: 1 7411975.pdf: 3810386 bytes, checksum: 77633888140143d4a8bb1b67ccebcedc (MD5) Previous issue date: 1973
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A genetic basis for life history differences among populations of the midge, Chironomus riparius (Diptera:Chironomidae)
Laboratory and field experiments were conducted with six populations of Chironomus riparius to test for variation among the populations in life history parameters such as growth. mortality and/or reproductive rates. Egg masses of C. riparius from five field populations and one laboratory population …
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Application of Spatial Analysis in the Incidence of the Gall Midge in Jamaican Hot Pepper Production
… production due to a quarantine pest -- the gall midge (Contarinia lycopersici; Prodiplosis longifila). There is a threat of gall midge introduction into the United States, where the insect pest is not known to occur. This research tests the significance of a range of variables to gall midge …
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The role of chemicals in the location of host plants by midge pests of UK fruit crops
Gall midges (Diptera: Cecidomyiidae) are important pests of many horticultural crops. They are difficult to control by conventional means as the larvae develop in galls surrounded by plant tissue. Gravid females need to locate suitable host plant material on which to lay their eggs and there is …
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Ecological and Evolutionary Consequences of Variation in Clutch Size in Asteromyia Carbonifera (o.s.) (Diptera: Cecidomyiidae)
The gall-midge Asteromyia carbonifera induces blister-like galls on the leaves of Canadian goldenrod, Solidago canadensis (Compositae). Female midges deposit one to five offspring per gall. During their brief adult existence, females produce a number of galls. The number of eggs laid at each …
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Investigation into the effects of parasitoids on a gall midge Dasineura sp. (Cecidomyiidae), a biological control agent of Australian myrtle, Leptospermum laevigatum
… second agent a Dasineura sp (Cecidomyiidae) gall midge whose origin in unknown but was probably introduced accidentally. As it was not screened before release an investigation into the effect of parasitism on its effectiveness as a control agent is important. Midges were found to select plants for …
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Asynchrony in the dynamics of chironomids across six locations in northeastern Iceland
… 18-year time series of abundances of non-biting midges (Diptera: Chironomidae) from window trap samples at five lakes in northeastern Iceland: Miklavatn, Sílalækjarvatn, Skjálftavatn, Víkingavatn, and Mývatn. The largest lake, Mývatn, consists of two distinct basins which I treat as separate …
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Patterns of parasitism and emergence in the gall midge Dasineura Dielsii (Diptera: Cecidomyiidae) : a biological control agent of Acacia cyclops in South Africa
… agent for A. cyclops. This gall-forming midge destroys inflorescences and prevents seedpods from forming, but allows continued harvesting. Insects overwinter as larvae within their galls. This study examined the levels of parasitism experienced by dormant D. dielsii larvae, as well as the …
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Effects of Short-Term Dewatering on Grazer Abundance and Algal Biomass in a Wastewater Treatment Algal Turf Scrubber
… pesticides are being used to control the midge larvae populations. Limited research is published in the area of non-chemical means of midge fly control. Dewatering is the non-toxic alternative proposed in this study. Three questions were discussed in this experiment. First, is dewatering …
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Biological and Agronomic Aspects of Two Insect Predators of Switchgrass
… tiller and rhizome loss. The switchgrass midge (Chilophaga virgati Gagné: Diptera: Cecidomyiidae) feeds above the last internode of the tiller, causing seed yield and biomass loss. There were two objectives for this study: (1) to determine genetic and temporal variation among cultivars for …
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Aquatic toxicity of one dimensional carbon nanomaterials
… carbon nanomaterials (CNMs) to amphipods, midge, oligochaetes and juvenile mussels in water and sediment. As-produced or modified carbon nanotubes (CNTs) and silicon carbide nanowires (SiCNW) were selected to represent CNMs. Sediment tests were conducted for 10-d with SiCNW and for 14- and …
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A study of biting midge populations and an assessment of Bluetongue virus presence in southern Ontario, with a visual dichotomous key to the North American genera of Ceratopogonidae
Biting midges (Diptera: Ceratopogonidae) are flying insects that feed on blood in order to produce eggs. Due to their bloodfeeding habits, some species act as vectors for viruses, many of which affect ruminant animals. This establishes ceratopogonids as possible threats to livestock farmers, and …
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Insects in mountainous landscapes: Implications of landscape context and climate change
… (Hemiptera: Triozidae) and a (undescribed) gall midge (Diptera: Cecidomyiidae) were recorded in 2010 and 2011. In 2011, cecidomyiid galls were collected to investigate the cecidomyiid and its parasitoid Gastrancistrus sp. (Hymenoptera: Pteromalidae). Habitat suitability and patch-level …
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Olfactory responses of Dasineura Dielsi Rübsaamen (Diptera: Cecidomyiidae) females to host plant volatiles
… dielsi (Diptera: Cecidomyiidae), a gall midge, was introduced into South Africa as a biological control agent on the invasive alien plant species, Acacia cyclops (Mimosaceae). An investigation was launched to test the following hypotheses: 1) the midges respond to the scent of A. cyclops …
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Ecophysiology, Morphology and Phylogeography of Insects in the Scotia Arc
… relationships and divergence times of non-biting midges (Diptera) and beetles (Coleoptera) naturally occurring in the lands around the Scotia Arc. The main objectives here were to learn how the evolution of select species of these two orders of insects is linked to the region’s geographical …
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Living With Men : A Novel
… questions raised by such contemporary authors as Midge Dector and Doris Lessing.
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Caracterização taxonômica e biologia de uma espécie de Kempnyia Klapálek (Plecoptera, Perlidae) em um riacho da Floresta da Tijuca, Rio de Janeiro (RJ)
… K. tijucana has a peculiar association with a midge of the genus Nanocladius.
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