Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 422040
Title Reducing russeting of organically grown Elstar to increase quality
Author(s) Jong, P.F. de; Maas, M.P. van der
Source In: Proceedings of the 13th International Conference on Cultivation Technique and Phytopathological Problems in Organic Fruit-Growing. Proceedings of the conference. - Weinsberg, Germany : Fordergemeinschaft Okologischer Obstbau e.V. (FOKO) - p. 54 - 58.
Event Weinsberg, Germany : Fordergemeinschaft Okologischer Obstbau e.V. (FOKO) 13th International Conference on Cultivation Technique and Phytopathological Problems in Organic Fruit-Growing, 2008-02-18/2008-02-20
Department(s) Applied Plant Research, Fruit Research Unit
Publication type Contribution in proceedings
Publication year 2008
Abstract Sales organisations indicated that opportunities for organic apples sales can increase when quality increases, in particular reducing the amount of russeting. The use of copper is probably the most important factor for russeting. Therefore a worst case scheme was compared with a scheme with reduced copper application. Furthermore, there was a particular interest in the effects on russeting of potassium bicarbonate (Armicarb) because this product might be an important element in a copper free fungicide scheme. Application of Armicarb was investigated on wet or dry canopy and effects of two different dosages were studied. All the schemes were compared with a worst case organic fungicide scheme with copper. The experiment was done on two year old Elstar trees because Elstar is the most important organically grown cultivar in the Netherlands. Effects of the schedules on russet and scab control were evaluated. At harvest no effects were found on scab. Between the different schemes with copper no differences were found in amount of russet. Only the highest dosage of Armicarb (10 kg/ha) and the schedules with Armicarb on a wet canopy gave more russet compared with the worst case scheme. Also effects on fruit rot were evaluated.
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