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Van Hemelrijck W.,Proefcentrum Fruitteelt Vzw Fruittuinweg | Hauke K.,Proefcentrum Fruitteelt Vzw Fruittuinweg | Creemers P.,Proefcentrum Fruitteelt Vzw Fruittuinweg | Mery A.,Laboratoires Goemar | Joubert J.-M.,Laboratoires Goemar
Acta Horticulturae | Year: 2012

Scab on apple, caused by the ascomycete Venturia inaequalis is one of the most important diseases in fruit growing. 75% of the pesticide use in apple production is related with control of fungal diseases, in which apple scab has a share of 70%. With the new regulation replacing Directive 91/414 and the Framework Directive on the sustainable use of Pesticides (2009/128/EC), products will disappear from the European market which will give a new challenge in IPM strategies to control pests and diseases. Besides, there is the pressure of environmental and consumer groups on supermarkets to reduce residues on fruits. As such, the use of pesticides is at the moment under debate. To this end, research concerning alternative control measurements experiences a boost. The active compound tested here is an oligosaccharide extracted from seaweed. It is an elicitor which induces plant resistance mechanisms to bacterial and fungal diseases. Used alone to fight the scab pathogen, it can reduce the disease pressure. Included in protection programs against scab throughout the secondary contamination of scab in summer, it also contributes to a reduction in fungicide applications and as such allows reducing residues on apples.

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