Institut für ökologische Chemie, Pflanzenanalytik und Vorratsschutz
The repellent developed in the former BOHNKAEF research project as well as the alternative substances obtained from natural biomass are being further developed through exact tests on practical plots or subjected to a comprehensive resistance test under different weather conditions. By monitoring and parallel odour collection and subsequent dynamic head-space analyses using GS/MS (gas chromatography and mass spectrometry), the effect of the repellents is to be recorded in a tightly meshed manner. The data set generated will be used to derive a reliable basis for advice on the optimal number and application rate of repellents. In addition to the repellents, the volatile organic compounds from the field bean flowers are also recorded in order to check changes in the bouquet caused by the repellent (plant-plant communication). The Kramer sphere/locomotion compensator is used to investigate the olfactory orientation of the broad bean beetle. The movement patterns can be used to determine whether the compounds offered are attractive or repellent. Furthermore, synthetic chemical-free methods for seed treatment of field beans are investigated, which counteract the effects of broad bean beetle infestation on the germination capacity of field bean batches as well as seed-borne fungal pathogens. In order to ensure economic feasibility, natural sources of fragrance from indigenously produced biomass from flowering plant species are to be developed for the production of the repellent solutions. Industrial waste products from the manufacturing processes of other products as well as cultivated species that can be grown internally without major hurdles offer another source in order to close sustainable material cycles quickly and economically. This creates additional branches of utilisation for the domestic cultivation of ecologically valuable plant species.
Bayerisches Staatsministerium für Ernährung, Landwirschaft und Forsten
