The present invention relates to a composition comprising at least one biological control agent selected from the group consisting of Bacillus chitinosporus AQ746 (NRRL Accession No, B-21618), Bacillus mycoides AQ726 (NRRL Accession No, B-21664), Bacillus pumilus (NRRL Accession No, B-30087), Bacillus pumilus AQ717 (NRRL Accession No, Β-21662), Bacillussp. AQ175 (ATCC Accession No, 55608), Bacillus sp, AQl 77 (ATCC Accession No. 55609), Bacillus sp, AQl 78 (ATCC Accession No. 53522), Bacillus subtilis AQ743 (NRRL Accession No. B-21665), Bacillus subtilis AQ713 (NRRL Accession No. B- 21661 ), Bacillus subtilis AQ153 (ATCC Accession No, 55614), Bacillus thuringiensls BD#32 (NRRL Accession No, B-21530), Bacillus thuringiemis AQ52 (NRRL Accession No, B- 21619), Muscodor albus 620 (NRRL Accession No, 30547), Muscodor roseus A3-5 (NRRL Accession No, 30548), Rhodococcus globerulus AQ719 (NRRL Accession No, B- 21663), Streptomyces galbus (NRRL Accession No. 30232), Streptomyces sp. (NRRL Accession No. B-30145), Bacillus thuringiensis subspec, kurstaki BMP 1 23, Bacillus subtilis AQ30002 (NRRL Accession No, B-50421 ), and Bocilius subtilis AQ 30004 (NRRL Accession No, B-50455) and/or a mutant of these strains having all the identifying characteristics of the respective strain, and/or a metabolite produced by the respective strain that exhibits activity against insects, mites, nematodes and/or phytopathogens and at least one insecticide selected from the group consisting of acetylcholinesterase (AChE) inhibitors, GABA-gated chloride channel antagonists, chloride channel activators and nicotinic acetylcholine receptor (nAChR) channel blockers in a synergistically effective amount. Furthermore, the present invention relates to the use of this composition as well as a method for reducing overall damage of plants and plant parts.La présente invention concerne une composition comprenant au moins un agent de lutte biologique choisi dans le groupe consistant en Bacillus chitinosporu