Gibt es bei Körnererbsen Sortenunterschiede in der Anfälligkeit gegenüber bodenbürtigen Krankheiten?

Soil borne diseases cause damage in production of peas on many organic farms. Several varieties and breeding lines from Czech Republic and the United States were compared with German varieties in naturally infected soils. Because of very dry weather conditions a field trial with spring peas did not show diseases. In pot trials some varieties with colored flowers (containing tannine) and some winter peas were included in the trials. Some genotypes showed a tendency to a lower level of infection and to higher plant weights compared to plants grown in soil being treated with heat. But in most cases there were no statistic significances. Nevertheless there is a potential for plant breeding to develop peas varieties with a better tolerance against soil borne diseases. Differential diagnosis can be used for testing varieties

Vogelfrass-Abwehr durch Saatgutbehandlung mit Pflanzenextrakten

Damages of planted seed and emerged seedlings caused by birds represent a significant problem in organic farming since there is no chemical repellent available. Bird attack often leads to reduced emergence and yield decrease. In the course of a perennial cooperation project 30 different plant extracts were systematically checked on the ability to prevent bird damage. Corn seed was applied with different extracts and tested via choice trials (seed and seedling) in aviaries. This screening resulted in detection of repellent effective extracts, whereby combined application of several extracts increased the positive activity. Accompanying tests showed no negative impacts of the extract application on seed quality (germination, vigour). First field trials (pheasants, crows) confirmed the aviaries results. Nevertheless long term effectiveness of the extracts in the field is still challenging. A new project (DevelOPAR) was initiated to further improve extract formulation and application technology. Extensive field trials are scheduled

Akkerdistel

De distel kan een probleem zijn, vooral in biologische boerderijen met een goede bodem. Er bestaat nog geen octrooioplossing voor de regulering ervan voor biologische landbouwbedrijven. Het kan echter nog steeds met succes worden geregeld door bepaalde agronomische regels in acht te nemen en in combinatie met gerichte bodembewerking. In de folder worden de oorzaken van de distelproblemen opgesomd en op basis van de praktijkervaring in verschillende landen worden aanbevelingen gedaan voor regelgeving, variërend van het voorkomen van onkruidplagen tot maatregelen voor grootschalige plagen

Ackerkratzdistel - Erfolgreich regulieren im ökologischen Landbau

Das Merkblatt enthält Empfehlungen, wie einer Verseuchung mit Disteln vorgebeugt werden kann. Ausserdem erläutert es Massnahmen zur Regulierung der Ackerkratzdistel in verschiedenen Verseuchungsstadien