Bacillus thuringiensis and Micromonospora echinospora ongrowth of Phaseolus vulgaris

Abstract

The well-known bacteria genus called as Bacillus thuringiensis (Bt) is recognized for being used in the biological control of insect pests in agriculture. However, there is little information on the effect of Bt as a plant growth promoter and in interaction with Micromonospora echinopora, which, being an endophyte, could improve the response of Phaseolus vulgaris with NH4NO3 atreduced at 30%of common recommended without risk of affecting plant health or yield.The objective of this work was to analyze the response of P. vulgaris to Bt and M. echinospora with NH4NO3 at 30% of recommended dose. The experiment was conducted under a randomized block design, using the response variables: germination percentage, phenology and biomass. The experimental data were analyzed by ANOVA/Tukey HSD (P<0.05). In the results, it was found that B.thuringiensis induced in P. vulgaris a yield of 3.2Ton/Ha, while with M. echinospora 3.6Ton/Ha was reached, with NF reduced at 30%, while it was shown that B.thuringiensis improved the yield with M. echinospora with 4.0Ton /Ha, values with statistical difference compared to the 2.8 Ton/Ha of P. vulgaris without B.thuringiensis or M. echinospora used as relative control with 100% of the NF.Concluded that B. thuringiensis is not only useful in biological control but that it can be an excellent growth promoter that can be improved with M. echinospora, another option for the sustainable production of P. vulgaris.