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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
11

Pest Management Studies of Early Season and Stalk-Boring Insects on Corn in Virginia

Jordan, Timothy Augustus 15 April 2008 (has links)
Separate field studies were started in fall 2005, which continued through fall 2007, to investigate the effect of different levels of European corn borer tunneling on yield in corn grown for grain and to predict spring infestation levels of early season soil insects, specifically white grubs (Coleoptera: Scarabaeidae) and wireworms (Coleoptera: Elateridae) in cornfields. In the first study, model variables included corn growth stage and larvae per plant. In both years of this study, larvae per plant had a significant effect on grain yield. Grain yield was reduced by 13.1 and 3.65% in plants infested with four larvae per plant in 2006 and 2007, respectively. For 2006, linear regression models provided average percent yield loss per larva per plant at 4.1, 6.8, and 1.8% during late vegetative (V12), early silking (R1), and blister (R2) growth stages, respectively. Economic injury levels (EILs) were calculated based on average percent yield reductions across each growth stage and year. In the second study, no significant differences were detected in both fall and spring between two sampling methods after correcting for differences in sampling volume. Strong correlations were observed between fall and spring grub densities in both years. In 2006, fields with grub densities above the spring nominal threshold had significantly greater stand and yield in the Poncho 1250 (1.25 mg clothianidin / kernel) treatment when compared to the Poncho 250 (0.25 mg clothianidin / kernel) and untreated plots. This information was used to develop fall EILs and economic thresholds for white grubs. / Master of Science in Life Sciences
12

Starling (Sturnus vulgaris L.) predation on grass grub (Costelytra Zealandica (White), Melolonthinae) populations in Canterbury

East, R. January 1972 (has links)
The main object of this study was to investigate the effects of predation by starlings (Sturnus vulgaris) on populations of the grass grub (Costelytra zealandica) in Canterbury, with the secondary objective of investigating the feasibility of life table studies of grass grub populations under Canterbury conditions. Study plots were established in four areas, two on non-irrigated pastureland at Lincoln and Weka Pass and two on irrigated pastureland at Winchmore. A third study plot was established at Winchmore in the second year of field work.
13

Urban Lawn Management: Addressing the Entomological, Agronomic, Economic, and Social Drivers

Alumai, Alfred 05 December 2008 (has links)
No description available.
14

„Nichts ist verschwunden“ : Eine Analyse des Zusammenwirkens von Dokumentarischem und Literarischem in Martin Jankowskis Roman Rabet oder Das Verschwinden einer Himmelsrichtung / “Nothing has vanished” : An analysis of documentary and literary aspects in Martin Jankowski’s novel Rabet oder Das Verschwinden einer Himmelsrichtung

Rödholm Siegrist, Helena January 2021 (has links)
Diese Analyse von Martin Jankowskis Roman Rabet oder Das Verschwinden einer Himmelsrichtung untersucht die Konstruktion einer literarischen Fiktion, die durch die dokumentarische Schilderung der friedlichen Revolution in Leipzig 1989 einen korrigierenden Beitrag zum Erinnerungsdiskurs leistet. Im Aufsatz werden Themen beschrieben, die durch das Fiktive, Metaphorische und Dialogische der Romanerzählung für die Gegenwart relevant gemacht werden. Dazu wird die Anwendung von literarischen Stilmitteln wie Metaphern, Ironie, Verschweigen, intertextuellen Referenzen und Transformationen analysiert. Neben der Interpretation des fiktionalen Erzählens, werden im Roman hervorgehobene und angedeutete Vorkommnisse untersucht, die noch heute sowohl auf gesellschaftliche Prozesse als auch auf private Beziehungen einwirken. / This analysis of Martin Jankowski’s Rabet oder Das Verschwinden einer Himmelsrichtung explores the construction of a literary fiction, which consists of a documentary and corrective contribution to the remembrance discourse of the Peaceful Revolution in the German Democratic Republic in 1989. Along with a description of themes which gain relevance through the fictional, metaphorical and dialogical features of the narration, the study undertakes an analysis of stylistic devises such as metaphors, irony, concealment, intertextual references and transformations. Besides an interpretation of the literary narration, the study examines the novel’s emphasis on the influence of past events on contemporary society and private relationships.

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