FIELD: chemistry.
SUBSTANCE: inventions relates to the field of biotechnology. A composition and a method for controlling the number of molluscs of the class Gastropoda and Bivalvia are claimed. The composition contains piliferolide A or 11-hydroxy-12-ene-octadecanoic acid, originating from Pseudomonas fluorescens ATCC 55799 of a suspension of its cells in the amount, effective for the regulation of the number of molluscs, and clayey mineral. The clayey mineral represents kaolinite, smectite, attapulgite or any their combination. The method of regulating the number of molluscs includes the introduction of one or more than one clayey mineral and piliferolide A or 11-hydroxy-12-ene-octadecanoic acid in the place, where control over the number of molluscs is desirable. The clayey mineral is taken in the quantity, effective for increasing the effectiveness of piliferolide A or 11-hydroxy-12-ene-octadecanoic acid by at least 20%. The presence of the clayey mineral enhances the molluscocidal effect of piliferolide A or 11-hydroxy-12-ene-octadecanoic acid.
EFFECT: inventions make it possible to increase the efficiency of chemical and biological control over the number of molluscs in open water bodies, power stations and stations for drinking water treatment under cold water conditions.
4 cl, 5 dwg, 6 tbl, 6 ex
