To improve consistency of biological control it
would be useful to associate several modes of
action, expressed simultaneously or successively.
As stated above, most of the effective BCAs possess
several modes of action and may be responsible for
the control of different diseases on the same host or
the same disease on several hosts (Pseudomonas spp
or Trichoderma spp). Thus, one can expect a better
efficacy and/or a better consistency if complementary
modes of action are expressed simultaneously.
Two ways have been explored to associate several
modes of action in the same product: associations
of several BCAs or association of several
modes of action in the same strain of a BCA.