Browsing Fakultät für Agrarwissenschaften (inkl. GAUSS) by Advisor & Referee "Tscharntke, Teja Prof. Dr."
Now showing items 41-60 of 74
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The role of sown wildflower strips for biological control in agroecosystems
(2010-07-02)As agriculture represents the main land user, agro-ecosystems are major drivers of landscape structure, biodiversity and associated ecosystem services. The extension of monocultures and ... -
Einfluss von ökologischem Landbau und Landschaftskomplexität auf die Wirbeltierdiversität und Ökosystemfunktionen
(2010-06-02)Agricultural intensification during the last decades has led to a serious decline in farmland biodiversity and has negatively affected related ecosystem functions such as pollination, pest ... -
Weed species diversity in cropping systems: Management and conservation strategies
(2010-05-26)Throughout the last decades, the intensification of farming practices accompanied by simplification of crop rotations, increased nitrogen fertilisation rates and weed control by highly ... -
Developing and testing plant health management options against the maize cob borer Mussidia nigrivenella Ragonot (Lepidoptera: Pyralidae) in West Africa
(2010-02-12)The present research project aimed at developing and testing different IPM components focusing on i) habitat management particularly maize-legume intercropping and trap crops, ii) botanical formulations with special ... -
Spatial aggregations in annual wild plant communities: Competition, Performance, and Coexistence
(2009-03-16)Biodiversity in agroecosystems has been declining at an alarming rate. Already in 1982, 15 of the 93 arable wild plant species listed in the German Red Data Book were extinct, which equalled ... -
Community structure and interaction webs of flower-visiting and cavity-nesting insects along an experimental plant diversity gradient
(2008-07-16)During the past decades a worldwide loss of biodiversity has been identified, and understanding the consequences for biotic interactions and associated ecosystem services has become a major ... -
Preference-performance relationships in herbivorous insects feeding on oilseed rape inoculated with soil-borne fungi
(2008-07-04)There is increasing evidence that plant-associated microorganisms are able to mediate plant-herbivorous insects-interactions. In this study, I evaluated the impact of two plant colonising ... -
Potential of the predatory pentatomid <i>Eocanthecona furcellata</i> (Wolff) as a biocontrol agent on American bollworm in cotton in Myanmar
(2008-06-02)The American Cotton Bollworm (Helicoverpa armigera Hübner)(ABW) is one of the most serious pests of cultivated crops, especially in cotton in Myanmar. Insecticide applications to control ... -
Agroforestry management, seasonal changes, biodiversity and multitrophic interactions of coffee arthropods
(2008-03-20)Ongoing landscape anthropogenic modification in the tropics has caused biodiversity losses of many taxa, threatening key ecosystem processes. Traditional coffee agroforests, which are the only forest-like vegetation remaining ... -
Funktionelle Vielfalt von Hymenopteren entlang eines Gradienten agroforstlicher Nutzung in Indonesien
(2008-03-19)The rate of deforestation of primary tropical forests due to agricultural expansion is higher in Southeast Asia compared to all other world's tropical regions. Deforestation in tropical forests is a major threat for ... -
Ecological, social and economic determinants in cocoa production systems in southern Cameroon
(2008-03-07)More diversified and species rich systems relate to functional consequences, which in turn will influence ecosystem processes, reducing outbreaks. This has been shown for landscape management practices and for intercropping ... -
Ensuring the Safety of Classical Biological Control for Cabbage Seedpod Weevil in Canada: Assessment of the Ecological Host Range of Candidate Ectoparasitoids in Europe and Clarification of their Taxonomic Status
(2007-09-19)Classical biological control of insect pests and weeds can lead to potential conflicts, particularly if the insect pest and weed agents are closely related. Such a conflict may occur in ... -
Phosphorus efficiency of Arachis pintoi genotypes and possible mechanisms for tolerance to low soil P supply
(2007-04-25)In natural tropical ecosystems, P availability is often too low for optimal plant growth due to their highly weathered soils with strong P buffer capacity. This fact has induced the development ... -
Effects of local and landscape factors on grassland plant diversity
(2007-03-12)During the last decades, both the decrease of the area and the fragmentation of semi-natural habitats in Central Europe caused a dramatic decline of biodiversity at local and regional scales. ... -
Insect diversity and trophic interactions in shaded cacao agroforestry and natural forests in Indonesia
(2006-11-22)In the tropics, human modification of pristine habitats is currently causing unprecedented biodiversity losses. In tropical landscapes, traditional shade agroforestry increasingly makes up ... -
Bees and wasps in agricultural landscapes: effects of dispersal corridors and land-use intensity at multiple spatial scales
(2006-08-04)Agricultural landscapes are characterized by close interactions between annually ploughed crop fields and relatively little disturbed noncrop areas. Many species have adapted to these mosaic ... -
Bienen, Wespen und deren Parasitoide in traditionellen Kaffee-Agroforstsystemen: Lebensgemeinschaftsmuster und Ökosystemdienstleistungen
(2006-06-28)In 22 traditional highly diverse coffee agroforests biodiversity patterns at multiple spatial and temporal scales and the importance of biodiversity for ecosystem functioning were analyzed. ... -
Plant communities in land-use systems of coastal Ecuador: diversity patterns, endemism, and species turnover at landscape scale
(2006-05-23)Fragmentation and destruction of once continuous natural vegetation are major threats to biological diversity. Since preservation of biodiversity can not only be realized through the ... -
Pflanze-Herbivore-Parasitoid Interaktionen auf Wildrosenarten und ihren Hybriden entlang eines geographischen Gradienten
(2006-03-24)Phenotypes of closely related plant species have been shown to affect higher trophic levels. Multitrophic interactions between host plant species, herbivores and natural enemies may change depending on phenotypic ... -
Einfluss des Wirtswechsels der Kohlmotte, Plutella xylostella L. auf Erbsen auf ihre natürlichen Feinde in Kenia
(2006-02-16)A population of the diamondback moth (DBM), Plutella xylostella L., known as an oligophagous pest on crucifers was recently found to infest sugar snap- and snowpeas (Diadegma semiclausum L.) in the Rift Valley in Kenya, ...