The experimental work was based on a design with two factors: isolates of arbuscular mycorrhizal fungi species predominant in the study area (see results, five different AM fungi species: Septoglomus constrictum EEZ 198; Diversispora aunantia EEZ 199; Archaeospora trappei EEZ 200; Glomus versiforme EEZ 201; Paraglomus ocultum EEZ 202 and a mixture or consortium of these AM fungi) and bacterial inoculation treatments [bacteria native isolated of study zone:
control (−); B. thuringiensis (B.t)].