Figure 1.
Effect of foliar treatment with plant biostimulants on the development of the leaves of P. caerulea plants after seven days from the first treatment and after 60 days from the first treatment: (a) effect on the leaf length (average of 10 leaves per replicate, four replicates per each treatment); (b) effect on the leaf width (average of 10 leaves per replicate, four replicates per each treatment); (c) effect on the average leaf area (cm2, average of 10 leaves per replicate, four replicates per each treatment). C—control (no treatment with plant biostimulants, treated only with water); T1—foliar treatment with Trichoderma consortium suspension, 106 cfu/mL, equiv. to 1011 spores/ha; T2—foliar treatment with 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 extract of the seaweed Ascophyllum nodosum, equiv. to 3 L/ha. The values presented represent means ± standard errors (n = 40 plants). Columns that are labeled with different letters, compared between the different treatments (C, T1, T2, and T3) within each parameter and time period (after 7 days and, respectively, after 60 days) are significantly different at p < 0.05.