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Physiologische und morphologische Auswirkungen amorpher Diatomeenerden auf ausgewählte vorratsschädliche Insekten
Inhaltsangabe:Einleitung: Die auftretenden Probleme bei der Anwendung von Pestiziden bei der Schädlingsbekämpfung führten zunehmend zu der Forderung nach umweltverträglicheren, biologisch spezifisch wirkenden Gegenmaßnahmen. In der vorliegenden Arbeit sollte die mögliche alternative Nutzung amorpher Diatomeenerden gegen ausgewählte vorratsschädliche Insekten im Vorratsschutz sowie die Wirkungsweise der Stäube auf diese untersucht werden. Zusammenfassung: Die Anzahl lebender Imagines des Kornschädlings S. granarius konnten mit den Diatomeenerden Fossil Shield*, Dryacide* und Silico-Sec* signifikant reduziert werden. Die niedrigsten Überlebensraten wurden mit der Kieselgur Fossil Sh...
The Aquatic Product Processing and By-product Utilization
Aquatic products are extremely popular with consumers since they have a unique taste and multiple bioactive substances such as protein, mineral elements, polysaccharides, and unsaturated fatty acids. However, the processing of aquatic products is still mostly at the primary processing level, resulting in a low utilization rate. Meanwhile, food processing causes a sizable number of by-products, seriously depleting natural resources and polluting the environment. Therefore, in-depth processing of aquatic products and the improvement of the comprehensive utilization of by-products are conducive to the high-value utilization of low-value aquatic products so as to maximize the development of aquatic resources, achieve sustainable development of resources, and ultimately obtain higher economic, ecological, and social benefits.
Identification of variation within sex pheromone blends of various Maruca vitrata populations for refining pheromone lures and traps in Asia
The legume pod borer, Maruca vitrata, causes severe damage on legume crops in the tropics. The larvae are mainly controlled by synthetic insecticides but without satisfying results. Monitoring of the moths using pheromone traps can help to perform target-oriented control measures. The objective of this study was the improvement of pheromone traps for monitoring M. vitrata in tropical Asia, where synthetic pheromone lures failed to attract males so far. In addition, the sexual communication system of different M. vitrata populations was investigated, since variation in pheromone composition is a potential reason for failure of pheromone lures.
Chemical ecology of Cabbage White (Pieris sp.) (Band 49)
Under the widespread concept of integrated pest management, use of semiochemicals have been extensively studied to control agricultural pest insects. In this regard, aphrodisiac pheromones of two most destructive pest species of Pieris have been investigated. Individual pheromone constituents produced in the wings of two Asian populations were compared with two European populations of P. rapae. The total pheromone levels in the European populations were lower than the amounts present in wings of Asian populations. As a result of this study, we can conclude that both the subspecies of P. rapae showed a clear variation in pheromone profile between them. On the other hand, within subspecies, the different populations did not show very large differences. Therefore, the populations with geographical difference could not be considered identical as they showed significant quantitative differences in pheromone profiles. Furthermore, Electroantennographic analysis was also carried out to find out specific pheromone lures, which could be used for both the subspecies to carried out field bioassays in future, to test the mating disruption strategy.
Tropentag 2015
Large quantities of water are appropriated to produce the feed annually consumed in global livestock production. Rising concerns about increasing competition for water resources and projected increase in demand for livestock products make it imperative to look for strategies to sustainably increase livestock production, with water being one key natural resource to consider. Using a combination of different datasets, a mechanistic livestock model, and a dynamic vegetation model, we estimate the annual consumptive water use (CWU) in the global livestock sector associated with crops and fodder cultivated on cropland and grazed biomass from pastures.
III-Nitride Ultraviolet Emitters
This book provides a comprehensive overview of the state-of-the-art in group III-nitride based ultraviolet LED and laser technologies, covering different substrate approaches, a review of optical, electronic and structural properties of InAlGaN materials as well as various optoelectronic components. In addition, the book gives an overview of a number of key application areas for UV emitters and detectors, including water purification, phototherapy, sensing, and UV curing. The book is written for researchers and graduate level students in the area of semiconductor materials, optoelectronics and devices as well as developers and engineers in the various application fields of UV emitters and detectors.
