Abstract

GODINEZ-PAOLI, Rafael et al. Fungicides, biocontrollers and resistance inducers in commercial bell pepper hybrids inoculated with Phytophthora capsici. Rev. mex. fitopatol [online]. 2020, vol.38, n.2, pp.258-268.  Epub Nov 27, 2020. ISSN 2007-8080.  https://doi.org/10.18781/r.mex.fit.2002-1.

The aim of this research was to evaluate the resistance level of different commercial bell peppers hybrids (Caoba rojo, Dicaprio amarillo, Pimiento Olvera, Sympathy, California wonder y PS16364212), to P. capsici by using fungicides, biocontrollers and inducers of resistance. The essay was carried out under greenhouse conditions in black polyethylene bags with tezontle sand as substrate. The products were applied according to the manufacturer’s recommended dose, applied 10 and 20 days after transplantation. Subsequently, the plants were inoculated with a solution of mobile zoospores at a concentration of 1x10-6. Three visual evaluations were carried out to record incidence, severity and AUDSC. It was found that PS16364212 presented better resistance to P. capsici attack with 14.9% incidence and 15.7% day-1 (AUDSC) compared to California wonder (44.2% incidence). The application of Metalaxil-M and Acibenzolar-S-methyl showed the lowest AUDSC (0.8 and 6.8% dia-1, respectively), so that both products can be considered as an alternative for their use within the integrated management of wilt of the chili.

Keywords : Capsicum annuum; oomycetes; wilting; Acibenzolar-S-methyl; defense activator; systemic resistance.

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