Abstract

LEOS-ESCOBEDO, Lucio et al. Consortia of mycorrhizal fungi and rhizobacteria in the biological control of Phythopthora capsici in Capsicum annuum cultivars. Biotecnia [online]. 2022, vol.24, n.1, pp.30-37.  Epub June 13, 2022. ISSN 1665-1456.  https://doi.org/10.18633/biotecnia.v24i1.1490.

The reconversion of agriculture demands sustainable alternatives, among which the use of rhizospheric fungi = arbuscular mycorrhizal fungi (AMF) and plant growth-promoting rhizobacteria (Rpcv) stand out. The general objective of the present investigation was to evaluate consortiums of mycorrhizal fungi and rhizobacteria as biological control vs Phythopthora capsici, in cultivars of 23 genotypes of chili peppers. The AMF that made up the consortium were: six strains of Rhizophagus intraradices. Likewise, four strains of Rpcv, three of the Pseudomonas genus, Acinetobacter guillouiae and Aeromona caviae. The study treatments were four: T1 = Control (No nutritional contribution (water)), T2 = Consortium = (mixture) of the six AMF, T3 = Consortium of six AMF plus the consortium of four Rpcv, T4 = Chemical fertilization based on a nutrient solution. The plants resistance to the P. capsici attack increased, resulting in a reduction in the fungus attack capacity in plants of 23 cultivars of chile. The Pasilla-type and Guajillo-type chili cultivars presented the highest resistance to the attack of P. capsici, when inoculated with AMF + Rpcv, while the Serrano, Puya and Jalapeño-type chilies were the ones with the highest susceptibility to the attack of the phytopathogenic fungus.

Keywords : Mycorrhizae; chilli drier; phytopathogens; biological control.

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