Entwicklung eines zeitlichen und räumlichen Entscheidungshilfesystems gegen den Erbsenwickler (Cydia nigricana, Fabricius)

Pea moths (Cydia nigricana) can cause severe damages in pea crops (Pisum sativum). Larvae feed on the seeds in the pods and contaminate them with feces. In the cultivation of organic green peas 0.5 % damaged seeds lead to the denial of whole pea fields (Schulz & Saucke 2005). There can be a yield loss in forage peas and a loss of quality of seeds for propagation. Within the framework of the project to improve the spatial and temporal cultivation strategy of peas to get less damage due to pea moths, is the intention. For a better spatial and temporal cultivation strategy, the DSS creates a map with areas with an infestation risk factor. The higher the risk factor, the earlier the new fields should be cultivated. Therefore, the first part of the DSS works with georeferenced data, like distances between fields of the previous year and the currently planned fields and their infestation risk. The coincidence of the flowering of peas and the flight of pea moths is very important for the infestation. Hence, the second part of the DSS predicts the phenology of the pea and the development of the pea moth for a better precision of the pest control

Erbsenwickler (Cydia nigricana) in Gemüse- und Körnererbsen: Grundlagen zur Befallsprognose und Schadensprävention

Spatio-temporal distribution, combined with aspects of insect biology and ecology can influence the infestation risk of the key pea pest Cydia nigricana in vegetable- and field peas. The proximity of pea fields of the previous cultivation period highly affects the infestation potential of the moth. The presented study aims to monitor the infestation development in three different regions in Germany (North Hesse, Saxony, Saxony-Anhalt) in four consecutive years and to relate empirical pest incidences to key factors as crop abundance, the distance to previous pea fields, the pea plant phenology and climatic conditions. In a next step, these data will form the basis for the elaboration of a computer-aided decision support system, which assists farmers in implementing preventive strategies based on risk avoidance

Measurement of the Electric Form Factor of the Neutron at Q^2 = 0.3-0.8 (GeV/c)^2

The electric form factor of the neutron, G_En, has been measured at the Mainz Microtron by recoil polarimetry in the quasielastic D(e_pol,e'n_pol)p reaction. Three data points have been extracted at squared four-momentum transfers Q^2 = 0.3, 0.6 and 0.8 (GeV/c)^2. Corrections for nuclear binding effects have been applied.Comment: 9 pages, 7 figures, 2 tables. Accepted for publication in EPJ

Exploring biographical fictions: the role of imagination in writing and reading narrative

The creation of a literary biography requires an awareness both of how we construct what we believe we ‘know’ about a writer, and how the stories we adopt change our reading of their works. Research into the sources used to construct Marlowe’s and Shakespeare’s biographies supports the conclusion that when writers can no longer create their own stories, those created about them are necessarily fictions, even if delivered under the supposedly more ‘factual’ genre of biography. Historical biographers construct narrative by imaginative interpretation of evidence. Writers’ biographies are commonly written not by historians but by literary critics, who draw extra biographical ‘evidence’ from interpreting the author’s works. But interpreting the works is a highly subjective exercise, and the story we find there may depend upon the story we are looking for. In the process of researching and writing a novel in verse based on Marlovian Theory - the idea that Christopher Marlowe faked his own death, fled to Northern Italy and wrote the works attributed to Shakespeare - the utilisation of Shakespeare’s Sonnets to create a new narrative exposes the inherently deceptive nature of poetry. By switching between literal and figurative readings, and emphasising previously overlooked phrases, it is possible to interpret the Sonnets in such a way that they support Marlovian Theory more easily than they support the orthodox narrative

Oxidation at the Subnanometer Scale

Metals are commonly oxidized under ambient conditions. Although bulk oxidation has received considerable attention, far less is known about oxidation at the subnanometer scale. This is unfortunate, as metal particles used in heterogeneous catalysis typically range from subnanometer to some nanometers. Here, density functional theory calculations are used to explore oxidation of gas-phase transition metal clusters in the range from the dimer to the dodecamer. Comparisons with the corresponding bulk systems uncover that the decomposition temperature of stoichiometrically oxidized clusters may be lower than for the bulk. Despite pronounced variations in ground state geometries, oxidized clusters closely mimic energetic trends across the periodic table valid for bulk systems

The adsorption of co on transition metal clusters: A case study of cluster surface chemistry

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