Researchers of Applied Plant Research (PPO), a part of Wageningen University and Research Centre are involved in intense cooperation with various European partners for the purpose of durable scab control in organic apple cultivation. Apple scab is caused by a fungus (Venturia inaequalis) and is a major economic issue in all areas where apples are grown. The disease mainly develops in cool, rainy conditions in the spring, and the resulting spots can make apples difficult to sell. Furthermore, early leaf loss generates indirect damage by reducing the vitality of the trees.
The researchers studied the effects of yucca extracts in the laboratory as well as in the orchard. When examining apple seedlings in the laboratory, researchers found that the extract had both a preventive and a curative effect. The extract achieves the former by preventing the fungus from budding and thereby from infecting the plants. A curative effect is also active until at least one day after the plant is infected by the fungus.
The extract was shown to be promising in practice as well during field tests in a PPO orchard in Randwijk, the Netherlands, and another orchard in Denmark. The effects were found to be as good as those of a low dose of copper. While organic growers in Europe currently depend primarily on copper, sulphur and lime sulphur to fight scab, copper is no longer allowed in the Netherlands, and the European Commission has decided to ban the use of copper throughout Europe.
This study took place under the auspices of the EU project Repco (project nr 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 copper in the organic production of grapevine and apples.
Jac Niessen | alfa
Cereals use chemical defenses in a multifunctional manner against different herbivores
06.12.2018 | Max-Planck-Institut für chemische Ökologie
Can rice filter water from ag fields?
05.12.2018 | American Society of Agronomy
What if, instead of turning up the thermostat, you could warm up with high-tech, flexible patches sewn into your clothes - while significantly reducing your...
A widely used diabetes medication combined with an antihypertensive drug specifically inhibits tumor growth – this was discovered by researchers from the University of Basel’s Biozentrum two years ago. In a follow-up study, recently published in “Cell Reports”, the scientists report that this drug cocktail induces cancer cell death by switching off their energy supply.
The widely used anti-diabetes drug metformin not only reduces blood sugar but also has an anti-cancer effect. However, the metformin dose commonly used in the...
A research team from the University of Zurich has developed a new drone that can retract its propeller arms in flight and make itself small to fit through narrow gaps and holes. This is particularly useful when searching for victims of natural disasters.
Inspecting a damaged building after an earthquake or during a fire is exactly the kind of job that human rescuers would like drones to do for them. A flying...
Over the last decade, there has been much excitement about the discovery, recognised by the Nobel Prize in Physics only two years ago, that there are two types...
What if a sensor sensing a thing could be part of the thing itself? Rice University engineers believe they have a two-dimensional solution to do just that.
Rice engineers led by materials scientists Pulickel Ajayan and Jun Lou have developed a method to make atom-flat sensors that seamlessly integrate with devices...
12.12.2018 | Event News
10.12.2018 | Event News
06.12.2018 | Event News
13.12.2018 | Life Sciences
13.12.2018 | Physics and Astronomy
13.12.2018 | Earth Sciences