Method of combating phytopathogenic microorganisms in the water circuits of greenhouses

US6096226A · kind A · utility

Assignee

• Degussa-Huels AG · DE

Inventors

• Rainer Fuchs · Halver, DE
• Michael Huss · Eschborn, DE
• Thomas Luy · Alzenau, DE

Key dates

• Filing date: Mar 23, 1999
• Grant date: Aug 1, 2000
• Expiry date: Mar 23, 2019

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C02F1/50
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The phytotoxic action of too high a concentration of peroxygen compounds such as peroxycarboxylic acids and hydrogen peroxide in the combating of phytopathogenic microorganisms, such as fusaria, in the water systems of plant irrigation systems, especially greenhouses, can be eliminated. The water is treated with a peroxycarboxylic acid solution which is brought in contact with a solid decomposition catalyst for active-oxygen compounds before the water is used for irrigation, in order to reduce the content of peroxycarboxylic acid and hydrogen peroxide. The water contacts and flows through a fixed bed of decomposition catalyst, by trickling over it or flowing through the conduits of a monolithic block coated with a decomposition catalyst such as platinum, palladium or rhodium.