Fig. 3.

Pseudomonas protegens CHA0 can be dispersed to new host plants by adult Delia radicum flies. Colonization levels of CHA0-gfp2 on roots of rapeseed plants. Plants were grown in sterile soil for 18 days and were then exposed for nine days to flies, which had developed from larvae feeding on roots of control or CHA0-gfp2 treated cauliflower plants, i.e., the previous plant host. In the CHA0 treatment, in twelve out of thirteen (experiment one) (a) and in eight out of nine (experiment two) (b) systems, rapeseed roots became colonized by P. protegens CHA0-gfp2. Numbers above boxes indicate sample size