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Obtaining alternative fungicides from marc as copper replacement for organic farming
Project
Project code: 2809OE040
Contract period: 01.11.2010
- 31.12.2014
Budget: 412,224 Euro
Purpose of research: Applied research
The only currently existing fully effective and approved plant protective measures in organic agriculture are preparations based on copper compounds, which leads to accumulation of this heavy metal in the soil, with toxic effects at certain levels. One approach in organic agriculture is to support and strengthen the natural defenses of plants against fungal infections. The aim of this study was to investigate the potential of grape seed extracts to strengthen the plants in organic viticulture against downy mildew (Plasmopara viticola) and other pathogens such as Phytophthora infestans as cause of blight.
At first, the extraction process, composition of the extracts and their storage stability were investigated. Subsequently, various self-produced and purchased extracts from grape seeds were investigated in the greenhouse and field under artificial or natural infection conditions. In the greenhouse, the plants treated with some extract-mixtures showed similar low infection rates as plants that were protected with conventional pesticides. With a natural infection regime and accurately timed and more frequent extract applications, the vines were strengthened enough to have similar low infection rates as it was the case with conventional plant protection products. Positive effects could also be observed with tomatoes.
Grape seed extracts are registered as VitoVin -Plant Strengthener at the Federal Office of Consumer Protection and Food Safety and are registered as a trademark.
Section overview
Subjects
- Crop Protection
Framework programme
Federal Organic Farming Scheme and other forms of sustainable agriculture (BÖLN)
