Influence of Inoculum Concentration on In Vivo Incubation Period of Emmia lacerata, Pathogenesis and Management of Wilt in Pepper (Capsicum annuum L.)

Authors: Adedire OM, Adedire DE , Owoeye TE and Aina A*

DOI: 10.23880/oajpr-16000325

Volume 8, Issue 4

Abstract

Emerging infectious disease, caused by Emmia lacerata (a host-jumping phytopathogen with medical significance), is a potential threat to production and consumption of pepper. Characterizing the pathogenesis of E. lacerata and management of Emmia Wilt (EW) in pepper is imperative. In vitro antifungal property of Bacillus velezensis EBs02 and B. thuringiensis EBs04 against E. lacerata FMIB29 was screened on dual-culture agar. Effect of inoculum dose on incubation period, severity of EW and its biocontrol was investigated. Bacillus velezensis EBs02 expressed the highest mycelial control (68.33%) against FMIB29. A 2-week incubation period was observed for E. lacerata in pepper and plants infected with 108 spore/mL exhibited the highest EW severity index (45.01%). Highest in vivo disease control (72.75%) was observed in pepper treated with EBs02 and differences in inoculum dose of FMIB29 neither influenced wilt severity nor the biocontrol potential of Bacillus strains. However, both Bacillus strains drastically reduced the manifestation of wilt in pepper.

Keywords: Bacillus; Biocontrol; Emmia Wilt; Inoculum Dose; Pepper

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