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Effects of the period of application of K-phosphite on residues on apple fruits

Kelderer, Markus; Matteazzi, Aldo and Casera, Claudio (2006) Effects of the period of application of K-phosphite on residues on apple fruits. [Nebenwirkungen auf den Fruchtansatz der Behandlungen von Schwefelkalk in die Blüte mit der Beregnung bzw. mit dem Sprüher.] In: Boos, Markus (Ed.) Ecofruit - 12th International Conference on Cultivation Technique and Phytopathological Problems in Organic Fruit-Growing: Proceedings to the Conference from 31st January to 2nd February 2006 at Weinsberg/Germany, pp. 225-227.

[thumbnail of ecofruit_12th_39.pdf] PDF - German/Deutsch


K-phosphite is very efficient against several plant diseases. Nevertheless at the moment there is no official
registration in Europe as a plant protection material. In conventional winegrowing K-phosphite is used in
different countries to regulate the main disease ‘Plasmopora viticola’ under the disguise of a foliar fertilizer or
a plant strengthener. In organic apple production only a few fungicides to regulate scab are available. In
addition, copper products are limited by European and national legislations. The discussion about Kphosphite
for organic farming points always at the problem of synthetic residues on the edible parts of the
vegetables. The aim of this field-trial carried out during the season of 2005 was to assess the residues on
apples after applications of K-phosphite at different moments during the season. The results show that
treatments before blossom leave no residues wheras treatments after blossom lead to the same level of
residues independently of the period of application.

EPrint Type:Conference paper, poster, etc.
Type of presentation:Paper
Keywords:Apple, organic orchards, K-phosphite
Subjects: Crop husbandry > Crop health, quality, protection
Crop husbandry > Production systems > Fruit and berries
Research affiliation: International Conferences > 2006: Ecofruit
Related Links:http://www.ecofruit.net
Deposited By: Tagung, Ecofruit
ID Code:13868
Deposited On:18 Sep 2008
Last Modified:12 Apr 2010 07:37
Document Language:German/Deutsch
Refereed:Peer-reviewed and accepted

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