Figure 4.

Activity of entomopathogenic nematodes (EPN) post application in three field trials. EPN activity was quantified by a Galleria mellonella larvae infection assay in soil samples from the (A) COMBINATION, (B) PERFORMANCE-1 and (C) PERFORMANCE-2 trials. Inoculants were Heterorhabditis megidis (N1), Heterorhabditis bacteriophora (N2), Steinernema carpocapsae (N3), and Steinernema feltiae (N4), individually or in combination with Pseudomonas protegens (B1), Pseudomonas chlororaphis (B2), and Rhizoglomus irregularis at two dosages (F1 and F1*). Mixtures of EPN or bacteria are indicated with NM and BM, respectively (for details see Figure S1). Bar graphs report means (± SEM). Significant differences between treatments were calculated with one-way ANOVA (significance level P < 0.05) followed by the Tukey post-hoc test. Different letters indicate statistical significance at P < 0.05.