Potassium phosphonates

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Potassium phosphonates (formerly: potassium phosphites ) are the potassium salts of phosphonic acid and belong to the group of phosphonates .

Examples of potassium phosphonates are potassium hydrogen phosphonate and dipotassium phosphonate .

use

Mixtures of potassium hydrogen phosphonate and dipotassium phosphonate were listed in Germany as plant strengtheners for conventional and organic cultivation until 2013 . They have been approved as plant protection products in the EU since April 2013 and can therefore no longer be used in organic farming. Kaliumphosphonate have a fungicidal activity against downy mildew ( Peronospora ) on the producer and against the late blight ( Phythophtora ) in potatoes. Potassium sosonate preparations for use against downy mildew in viticulture are available in Germany and Austria; in Austria a preparation effective against scab in pome fruit is also approved. Like other phosphonates, potassium phosphonates also serve as phosphorus fertilizers. Furthermore, like other phosphonates, they have a nematocidal effect against Meloidogyne javanica and Meloidogyne incognita .

Individual evidence

  1. ↑ Directorate-General for Health and Food Safety of the European Commission: Entry on Potassium phosphonates (formerly potassium phosphite) in the EU pesticide database ; Entry in the national registers of plant protection products in Switzerland , Austria and Germany ; Retrieved September 26, 2016.
  2. ↑ Baden-Württemberg: Heavy rainfall leads to difficulties in viticulture , June 21, 2016.
  3. ↑ RA Kumar, KT Velayudhan, K. Vasu, V. Ramachandran, RS Bhai, G. Unnikrishnan: Interaction of potassium phosphonate fungicide in laterite soil. In: Journal of environmental science & engineering. Volume 47, Number 4, October 2005, pp. 276-285, PMID 17051913 .
  4. ^ S. Habash, L. Al-Banna: Phosphonate fertilizers suppressed root knot nematodes Meloidogyne javanica and M. incognita. In: Journal of nematology. Volume 43, Number 2, June 2011, pp. 95-100, PMID 22791918 , PMC 3380461 (free full text).