The present invention relates to a composition comprising at least one biological control agent selected from the group consisting of Paecilomyces lilacinus strain 251 (AGAL No. 89/030550) and Coniothyrium minitans CON/M/91-08 (DSM 9660) and/or a mutant of these strains having all the identifying characteristics of the respective strain, and/or at least one metabolite produced by the respective strain that exhibits activity against nematodes, insects and/or phytopathogens, and at least one fungicide (I) selected from the group consisting of compounds capable to introduce a host defence, inhibitors of the amino acid and/or protein biosynthesis, inhibitors of the ATP production, inhibitors of the cell wall synthesis, inhibitors of the lipid and membrane synthesis, inhibitors of the melanine biosynthesis, inhibitors of the nucleic acid synthesis, inhibitors of the signal transduction, compounds capable to act as an uncoupler, and other fungicides in a synergistically effective amount. Furthermore, the present invention relates to a kit of parts comprising said composition and the use of said composition.COMPOSICIÓN QUE COMPRENDE AL MENOS UN AGENTE DE CONTROL BIOLÓGICO (I) ELEGIDO DE PAECILOMYCES LILACINUS CEPA 251 Y CONIOTHYRIUM MINITANS CON/M/91-08 Y/O UNA MUTANTE DE ESTAS Y AL MENOS UN FUNGICIDA (I)； ÚTIL COMO PESTICIDA； KIT DE PARTES Y PROCEDIMIENTO QUE LA COMPRENDE.
