Survival of Stenocarpella spp. in maize debris and soil suppressiveness to maize ear rot pathogens

Felipe Moretti Ferreira Pinto, H. Novaes Medeiros, V. Biazzotto Correia Porto, C. da Silva Siqueira, J. da Cruz Machado, J. Köhl, Flavio Vasconcelos de Medeiros

Research output: Chapter in Book/Report/Conference proceedingConference paperAcademic

Abstract

Stenocarpella species (S. maydis and S. macrospora) overwinter saprophytically in maize stubble but little is known about the factors that contribute to its survival and to the induction of suppressiveness of pathogen colonization. We aimed at determining the role of crop rotation on the survival of the pathogen and induction of specific or broad spectrum disease suppressivity. Maize fields cultivated with soybean crop rotation or maize monoculture were randomly sampled for Stenocarpella sp. detection. Stalks were sampled, DNA extracted and the pathogen quantified through qPCR. Soil from the same sampled sites was tested for suppressivity to F. graminearum, F. verticillioides and S. maydis. The crop rotation consistently contributed to the lowest Stenocarpella sp. quantification in maize stalks and also to the highest number of soils with suppressiveness to F. graminearum and F. verticillioides compared to the maize monoculture. The obtained data not only endorsed the importance of soybean crop rotation for broad spectrum control of stalk and ear rot causing pathogens but also pointed out the most promising fields to look for biocontrol agents once the suppressiveness is of biological nature.
Original languageEnglish
Title of host publicationPreceedings of the Meeting „Biocontrol and Microbial Ecology" at Berlin (Germany), September 12-15, 2016.
PublisherIOBC-WPRS
Pages155-159
Volume117
ISBN (Print)9789290673019
Publication statusPublished - 2016
EventBiocontrol and Microbial Ecology - Berlin, Germany
Duration: 12 Sep 201615 Sep 2016

Publication series

Name IOBC-WPRS Bulletin
Volume117

Conference

ConferenceBiocontrol and Microbial Ecology
CountryGermany
CityBerlin
Period12/09/1615/09/16

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