Characterization of Phytophthora spp. and application of rhizobacteria with biocontrol potential in black pod disease in Theobroma cacao variety CCN-51

Abstract

Caracterización de Phytophthora spp. y aplicación de rizobacterias con potencial en biocontrol de la enfermedad de la mazorca negra en Theobroma cacao variedad CCN-51 Characterization of Phytophthora spp. and application of rhizobacteria with biocontrol potential in black pod disease in Theobroma cacao variety CCN-51

Candidate rhizobacteria as plant growth-promoters and root-knot nematode controllers in tomato plants

“…Recently, seven rhizobacteria obtained from banana landraces rhizosphere in Los Ríos, Cotopaxi, and Bolívar provinces, Ecuador, and used in the present work, could be considered PGRP-like candidates due to their antagonistic activity (Chávez-Arteaga et al, 2018). Two of these strains, Acinetobacter calcoaceticus (BM2-12 strain) and Serratia marcescens (PM3-8 strain), showed negative effect in vitro and in vivo against Phytophthora palmivora, the causal agent of the black pod, as well as capacity plant growth-promoter on cocoa seedlings (Cedeño-Moreira et al, 2020). Studies on the use of PGPR in different crops of agricultural importance are very scarce.…”

“…Thus, the use of rhizobacteria is shown as an efficient strategy for phytopathogenic nematodes management (Hallmann et al, 1998;Sikora et al, 2008;Chávez-Arteaga et al, 2018). Agricultural soils have a high microbial diversity associated with different plant species root systems, highlighting the presence of Plant Growth Promoting Rhizobacteria (PGPR) (Cedeño-Moreira et al, 2020). These microorganisms can help in nitrogen fixation, increase the availability of nutrients in the rhizosphere, production of antibiotics, phytohormones, and siderophores (Siddiqui, 2005), as well as production of biofilms in different plant species (Haque et al, 2020).…”