Fig. 4.

Assessment of Pseudomonas fluorescens PpR24 population in all infected insecticide‐susceptible aphid clones. Growth assay with inoculation dose of 10² CFU ml⁻¹ on all sensitive clones (N = 3) for three days. After 48 h, P. fluorescens PpR24 CFUs of each aphid clone were determined by enumeration on LB‐Nitrofurantoin plates. No colonies were recovered from control sachets. The data represent the mean and standard error of three biological replicates of P. fluorescens PpR24 treated sachets that contained ten aphids of each clone. The results show a statistically significant (different letter) decrease in CFUs of both 4225B and clone‐NS as compared to 4106A clone (P < 0.05).