Biogenic control and limitation of the reproduction of parasitic earth nematodes in stock culture

• Main Authors: BELL DORIS, VON TAPAVICZA STEPHAN, KOPP-HOLTWIESCHE BETTINA
• Format: Patent
• Language: English
• Published: 20.05.2003
• Edition: 7
• Subjects: ADHESIVES; AGRICULTURE; ANIMAL HUSBANDRY; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES, AS HERBICIDES; CHEMISTRY; DYES; FERTILISERS; FERTILISERS CHARACTERISED BY THEIR FORM; FISHING; FORESTRY; HUMAN NECESSITIES; HUNTING; MANUFACTURE THEREOF; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENTSUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVINGA SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES,SOIL-CONDITIONERS, WETTING AGENTS; NATURAL RESINS; PAINTS; PEST REPELLANTS OR ATTRACTANTS; PHOSPHATIC FERTILISERS; PLANT GROWTH REGULATORS; POLISHES; PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTSTHEREOF; TRAPPING

The invention relates to use of (a) compounds of phosphorus containing at least partly lipophilic organic radicals together with (b) urea and/or urea derivatives in selected quantity ratios of (a) to (b) as a soil additive for biologically controlling plant-parasitic soil nematodes by strengthening the correspondingly antagonistic soil potential, more particularly by strengthening the growth of antagonistic and/or nematicidal rhizosphere bacteria and/or corresponding mycorrhiza strains-and at the same time strengthening the growth of cultivated plants in soil. The multicomponent mixtures which strengthen bacterial growth are preferably introduced into the region of the plant roots in the form of an aqueous preparation using plant-compatible emulsifiers before and/or during plant growth. Components (a) and (b) are used in such quantity ratios that the ratio by weight of C to N is no higher than 6:1 and preferably no higher than 5:1.