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 20 of 45 for “"Chrysomelidae"”.
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Bionomics of Diabrotica Longicornis (Say) and Diabrotica Virgifera, Leconte (Coleoptera: Chrysomelidae)
Made available in DSpace on 2014-12-11T18:05:35Z (GMT). No. of bitstreams: 1 7105158.pdf: 5158071 bytes, checksum: 24c3480357b35050a4d903bc83979ac2 (MD5) Previous issue date: 1970
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Resistance management of western corn rootworm (Coleoptera: Chrysomelidae) in transgenic Bt maize
Transgenic maize producing insecticidal toxins from the bacterium Bacillus thuringiensis (Bt) has been used to manage western corn rootworm, a major pest of maize, since 2003. However, this pest rapidly evolved resistance to Bt traits expressed in maize for rootworm management. This research …
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Behavior and Ecology of New and Old World Luperini Beetles (Coleoptera: Chrysomelidae)
In summary then, in my study I have been able to provide additional evidence of the close relationship between the Aulacophorina and the Diabroticina. The similar response and adaptation to cucurbitacins by these beetles suggests a common evolutionary origin of these two groups. However, the …
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Behavioral Responses of Diabroticite Beetles to Selected Olfactory and Visual Cues (Coleoptera: Chrysomelidae)
… beetles in the section Diabroticite (Coleoptera, Chrysomelidae, Galerucinae, Luperini, Diabroticina) (Smith and Lawrence, 1967) for identifying host plants, and to identify interactions among these cues. Combinations of plant volatile kairomones were used to examine species differences in response …
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Bionomics of the Bean Leaf Beetle Cerotoma Trifurcata (Forster) (Coleoptera: Chrysomelidae) in Illinois
Made available in DSpace on 2014-12-14T07:04:07Z (GMT). No. of bitstreams: 1 8004291.pdf: 2709484 bytes, checksum: 8f3f2e8867ba26c4c0ee9ea7c3624243 (MD5) Previous issue date: 1979
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PRE- AND POST-COPULATORY SEXUAL SELECTION IN THE TORTOISE BEETLE ACROMIS SPARSA (COLEOPTERA: CHRYSOMELIDAE)
<p>Females in nearly all sexually reproducing taxa mate with multiple males. In these species, male fitness is dependent on traits used during both the pre-copulatory processes influencing mate acquisition, as well as the post-copulatory processes influencing fertilization. However, few studies …
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PRE- AND POST-COPULATORY SEXUAL SELECTION IN THE TORTOISE BEETLE ACROMIS SPARSA (COLEOPTERA: CHRYSOMELIDAE)
<p>Females in nearly all sexually reproducing taxa mate with multiple males. In these species, male fitness is dependent on traits used during both the pre-copulatory processes influencing mate acquisition, as well as the post-copulatory processes influencing fertilization. However, few studies …
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The biology of the tobacco flea beetle in Virginia: Epitrix parvula (F.) (Coleoptera: Chrysomelidae)
The tobacco flea beetle is one of the major insect pests of tobacco in Virginia. The adult injures the plants by eating small irregular holes in the leaves and the larva by feeding on the roots of the plants. The tobacco flea beetle hibernates in the adult stage in leaves and trash around the edge …
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Hazai káposztabolha fajok (Phyllotreta Spp., Coleoptera, Chrysomelidae) tápnövénnyel összefüggő és feromonok segítségével történő kémiai kommunikációja
… fajok (Phyllotreta spp., Coleoptera, Chrysomelidae) keresztesvirágú növények régóta ismert, jelentős kártevői, mind Európában, mind Amerikában. Jelentőségük a termesztésben lévő, keresztesvirágú tápnövényeik széles skálájával magyarázható. Legjelentősebb kártételüket a kora tavasszal …
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Morfologia e efeitos do ataque de Metaxyonycha angusta (Perty) (Col.: Chrysomelidae) sobre o crescimento e produção de eucalipto
Este trabalho teve como objetivo o de ampliar as informações sobre a morfologia de adultos em Metaxyonycha angusta, e avaliar efeitos decorrentes do seu ataque sobre o crescimento das árvores em clones de eucalipto. Os estudos foram realizados num plantio clonal de eucaliptos no município de …
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Gene Expression and Behaviors Relating to Rotation Resistance in the Western Corn Rootworm, Diabrotica Virgifera Virgifera (Coleoptera: Chrysomelidae)
… (Diabrotica virgifera virgifera, Coleoptera: Chrysomelidae), but behavioral resistance to crop rotation is a major problem. Resistant adult females exhibit reduced fidelity to corn due to increased locomotor activity and lay their eggs in the soil of both in corn and soybean fields. This work …
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The Role of Attractants and Feeding Stimulants in The Selection of Cucurbita Flowers by Diabroticite Beetles, (Coleoptera: Chrysomelidae)
The floral fragrance of the male blossoms of Cucurbita maxima was analyzed chemically to determine the presence of olfactory stimulants for diabroticite beetles. While the mixture contained at least 40 components only one, indole, produced a substantial response in an electroantennogram bioassay. …
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Discovery and Phylogeny of the Odorant Binding and Chemosensory Proteins of Diabrotica Virgifera Virgifera (Coleoptera: Chrysomelidae) and Rhagoletis (Diptera: Tephritidae)
Although great strides have been made, we still lack a complete understanding of the molecular aspects of insect olfaction. Such knowledge has applications in pest control, as well as being crucial to understanding specific olfactory pathways and their evolution. Evidence suggests that both …
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The role of digestive proteases in the rotation-resistant phenotype of the western corn rootworm, Diabrotica virgifera virgifera (Coleoptera: Chrysomelidae)
… virgifera virgifera LeConte (Coleoptera: Chrysomelidae), is a significant insect pest of maize in the United States, Canada and Europe. Until the mid 1990s, this pest was successfully controlled by annual crop rotation, alternating maize with a non-host plant like soybean. However, massive …
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Western corn rootworm (Coleoptera: Chrysomelidae; Diabrotica virgifera virgifera LeConte) emergence and abundance in transgenic cornfields with structured and seed blend refuges
… and Canada, western corn rootworm (Coleoptera: Chrysomelidae; Diabrotica virgifera virgifera LeConte) larvae have been managed using transgenic Bt (Bacillus thuringiensis Berliner) corn hybrids expressing toxic Cry proteins (i.e., Cry3Bb1, Cry34Ab1/35Ab1, mCry3a) for a decade. To delay western …
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A Temperature-Dependent Development Model for Willow Beetle Species (Coleoptera: Chrysomelidae) in Ireland: Simulation of Phenology/Voltinism in Response to Climate Change
… lineola) willow beetles (Coleoptera: Chrysomelidae) are identified economically as two of the most damaging insect pests of SRCW in Ireland. Policies which mandate levels of renewable energy use, to mitigate future climate change, fail to consider adaptation in the energy sector under …
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Gut physiology and host-microbe interactions of the rotation-resistant variant of the western corn rootworm (Diabrotica virgifera virgifera LeConte) (Coleoptera: Chrysomelidae)
The western corn rootworm (WCR; Diabrotica virgifera virgifera LeConte) is an important chrysomelid pest of corn (Zea mays) in the US. WCR larvae feed on corn roots, while adult beetles may consume aboveground corn tissues. WCR larvae are nutritionally dependent on corn roots; completion of the …
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Field biology and mortality factors affecting Cassida rubiginosa Müller (Coleoptera: Chrysomelidae), a biological control agent of Canada thistle (Cirsium arvense (L.) Scop.)
Mean overwintering survival of beetles was 20.5 ± 17.2% and 21.3 ± 3.6% for two consecutive years. Leaf litter was the preferred hibernaculum followed by straw. Successful overwintering was not compatible with water saturated soil. The mean supercooling point of C. rubiginosa in summer was -5.2 ± …
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