Figure 6.

Mouse fibroblast NCTC L929 cell viability after incubation for 48 h with different concentrations of a hydroalcoholic extract of aerial parts of the P. caerulea plants sampled after seven days from the first treatment and after 60 days from the first treatment with plant biostimulants. C —plant control (no treatment with plant biostimulants, treated only with water); T1—foliar treatment with the Trichoderma consortium suspension, 10⁶ cfu/mL, equiv. to 10¹¹ spores/ha; T2—foliar treatment with the Trichoderma consortium suspension, 10⁸ cfu/mL, equiv. to 10¹³ spores/ha; T3—foliar treatment with a reference product, consisting of plant extracts, essential oils, and fatty acids in an oil/water emulsion, and the extract of the seaweed Ascophyllum nodosum, equiv. to 3 L/ha. The values presented are means  ±  standard errors (n  =  12 replicates) and are not statistically different.