BIOGENIC CONTROL AND LIMITATION OF THE PROLIFERATION OF PARASITIC SOIL NEMATODES IN CROP FARMING

摘要

The invention relates to the combined use of (a) phosphorus compounds with atleast partially lipophilic organic radicals and (b) urea and/or ureaderivatives in selected proportions of (a):(b) as soil additives forbiological control of phytoparasitic earth nematodes by increasing thecorrespondingly antagonistic potential of the soil, especially by promotingthe growth of antagonistic and/or netamaticidal rhizospheric bacteria and/orcorresponding mycorrhiza strains, while at the same time strengthening thegrowth of autochtonal plants. Preferably, the substance mixtures promotingbacterial growth are introduced into the root area of the plants in the formof an aqueous preparation in combination with phytocompatible emulsifiersbefore and/or during the raising of said plants. The components of subclasses(a) and (b) are used in such proportions that the weight ratio of C to N doesnot exceed 6 and is preferably 5.