Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Waste product of sugar reduces formation of apple scab ascospores

16.01.2007
Researchers at Wageningen University and Research Centre have shown that the fermented waste product of the sugar processing industry vinasse, reduces the formation of apple scab ascospores by more than 95 %. This is a breakthrough in organic apple growing because it means that autumn application of vinasse may strongly reduce the presence of this important disease in orchards.

The Wageningen researchers of the institutes Applied Plant Research (PPO) and Plant Research International (PRI) also found vinasse to considerably stimulate leaf degradation during winter. This even more reduces the quantity of scab inoculum in the orchard since the fungus is overwintering in leaves.

PPO and PRI are intensively cooperating with various European partners on sustainable scab control in organic apple growing. Apple scab is caused by a fungus (Venturia inaequalis) and is a major economic problem in all apple growing areas. The disease develops extremely well in climates with rainy spells in spring. The disease develops dark brown lesions on leaves and fruits, which makes them difficult to sell. Vinasse is a fermented waste product of the sugar processing industry and is used on a small scale as fertilizer in organic fruit growing.

Leaves with apple scab symptoms were placed between iron nettings and then dipped into different concentrations of vinasse in autumn. The vinasse concentration range was 50, 100, 200, 400 and 600 l per ha when recalculating the dipping concentration used during the experiments towards a commercial application in the orchard by treating the dropped leaves on the soil. Subsequently, the nettings were placed on the soil in an organic orchard. Leaves degraded naturally during winter and the remains of the leaves were examined for the presence of apple scab ascospores in early spring. The highest reduction in ascospores of more than 95 % was found at a dose level of 200 and 400 l vinasse per ha. This is a normal dose for soil fertilization in organic orchards.

Organic growers in Europe largely depend on copper, sulphur and lime sulphur to fight apple scab in spring and summer. Apple growers can now substantially reduce apple scab inoculum by leaf shredding and autumn application of vinasse. These sanitation practices help to reduce the use of copper in spring. This is a step forward in sustainable organic scab control, since copper is no longer allowed in the Netherlands for this purpose while the European Commission has decided to ban the use of copper throughout Europe.

This study was carried out in the context of the EU project REPCO (project no. 501452), which stands for Replacement of Copper in Organic Production of Grapevine and Apple in Europe, and is partly financed by the 6th Framework Programme of the European Commission. The goal of this project is to find alternatives for the use of copper in organic grapevine and apple production. Project Counsellor is Danièle Tissot Boireau, DG RTD Unit E03. Safety of Food Production Systems, SDME 8/22 Belgium (daniele.tissot@ece.eu.int). The project is coordinated by Jürgen Köhl, Plant Research International, Wageningen UR (jurgen.kohl@wur.nl).

Jac Niessen | alfa
Further information:
http://www.wur.nl

More articles from Ecology, The Environment and Conservation:

nachricht Scientists on the road to discovering impact of urban road dust
18.01.2018 | University of Alberta

nachricht Gran Chaco: Biodiversity at High Risk
17.01.2018 | Humboldt-Universität zu Berlin

All articles from Ecology, The Environment and Conservation >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Optical Nanoscope Allows Imaging of Quantum Dots

Physicists have developed a technique based on optical microscopy that can be used to create images of atoms on the nanoscale. In particular, the new method allows the imaging of quantum dots in a semiconductor chip. Together with colleagues from the University of Bochum, scientists from the University of Basel’s Department of Physics and the Swiss Nanoscience Institute reported the findings in the journal Nature Photonics.

Microscopes allow us to see structures that are otherwise invisible to the human eye. However, conventional optical microscopes cannot be used to image...

Im Focus: Artificial agent designs quantum experiments

On the way to an intelligent laboratory, physicists from Innsbruck and Vienna present an artificial agent that autonomously designs quantum experiments. In initial experiments, the system has independently (re)discovered experimental techniques that are nowadays standard in modern quantum optical laboratories. This shows how machines could play a more creative role in research in the future.

We carry smartphones in our pockets, the streets are dotted with semi-autonomous cars, but in the research laboratory experiments are still being designed by...

Im Focus: Scientists decipher key principle behind reaction of metalloenzymes

So-called pre-distorted states accelerate photochemical reactions too

What enables electrons to be transferred swiftly, for example during photosynthesis? An interdisciplinary team of researchers has worked out the details of how...

Im Focus: The first precise measurement of a single molecule's effective charge

For the first time, scientists have precisely measured the effective electrical charge of a single molecule in solution. This fundamental insight of an SNSF Professor could also pave the way for future medical diagnostics.

Electrical charge is one of the key properties that allows molecules to interact. Life itself depends on this phenomenon: many biological processes involve...

Im Focus: Paradigm shift in Paris: Encouraging an holistic view of laser machining

At the JEC World Composite Show in Paris in March 2018, the Fraunhofer Institute for Laser Technology ILT will be focusing on the latest trends and innovations in laser machining of composites. Among other things, researchers at the booth shared with the Aachen Center for Integrative Lightweight Production (AZL) will demonstrate how lasers can be used for joining, structuring, cutting and drilling composite materials.

No other industry has attracted as much public attention to composite materials as the automotive industry, which along with the aerospace industry is a driver...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

10th International Symposium: “Advanced Battery Power – Kraftwerk Batterie” Münster, 10-11 April 2018

08.01.2018 | Event News

See, understand and experience the work of the future

11.12.2017 | Event News

Innovative strategies to tackle parasitic worms

08.12.2017 | Event News

 
Latest News

Rutgers scientists discover 'Legos of life'

23.01.2018 | Life Sciences

Seabed mining could destroy ecosystems

23.01.2018 | Earth Sciences

Transportable laser

23.01.2018 | Physics and Astronomy

VideoLinks Science & Research
Overview of more VideoLinks >>>