Screening of Bacillus thuringiensis strains to identify new potential biocontrol agents against Sclerotinia sclerotiorum and Plutella xylostella in Brassica campestris L.

•A pool of one hundred and sixty-one B. thuringiensis strains was screened.•Six strains could protect B. campestris L. from S. sclerotiorum and P. xylostella.•Bt triggered ISR by simultaneously activating SA, JA, and ET signaling pathway.•Multifunctionality of Bt promote its use in controlling of pests and diseases.