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Degradation behaviour of potassium K-phosphite in apple trees

Kelderer, Markus; Matteazzi, Aldo and Casera, Claudio (2008) Degradation behaviour of potassium K-phosphite in apple trees. In: Boos, Markus (Ed.) Boos, Markus, (Hrsg.) Ecofruit - 13th International Conference on Cultivation Technique and Phytopathological Problems in Organic Fruit-Growing: Proceedings to the Conference from 18thFebruary to 20th February 2008 at Weinsberg/Germany, pp. 59-61.

[thumbnail of 059-061.pdf] PDF - German/Deutsch


Although potassium phosphite is not registered for organic fruit production in Europe, it
has long been regarded as a potential alternative to sulphur- and copper-containing
fungicides. In 2005/2006 a field trial was carried out to verify the presence of residues of
phosphoric acid over time in apples after applications of potassium phosphite at different
time-points. No residues were present on fruits if treatments were applied before flowering,
whereas treatments after flowering, in the summer or in autumn resulted in comparable
residue levels irrespective of the period of application. Residues were eveneven found in
leaves and fruits of the following years, 2006 and 2007.

EPrint Type:Conference paper, poster, etc.
Type of presentation:Paper
Keywords:apple, organic farming, phosphite, potassium phosphite
Subjects: Crop husbandry > Crop health, quality, protection
Crop husbandry > Production systems > Fruit and berries
Research affiliation: International Conferences > 2008: Ecofruit
Related Links:http://www.ecofruit.net
Deposited By: Tagung, Ecofruit
ID Code:13644
Deposited On:05 Aug 2008
Last Modified:12 Apr 2010 07:37
Document Language:English
Refereed:Peer-reviewed and accepted

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