Table 3 Mortality of Bursaphelenchus xylophilus Ka4, alone or in association with Serratia sp. LCN16 WT and mutants (Serratia sp. LCN16 oxyR::int(614) and Serratia sp. kat::int(808)), in H2O2 conditions (0 and 50Â mM). Statistical differences between treatment Ka4 and the other treatments (Ka4_LCN16 WT; Ka4_LCN16 oxyR::int(614); and Ka4_LCN16 kat::int(808)) were calculated using Students T-test (EXCEL version 15.14). Asterisk (**) denotes statistical differences at 99Â % confidence level