FAMES AND MICROBIAL ACTIVITIES INVOLVED IN THE SUPPRESSION OF CASSAVA ROOT ROT BY ORGANIC MATTER

Authors

  • Jéssica Morais da Silva Department of Agronomy, Universidade Federal do Ceará, Fortaleza, CE
  • Erika Valente de Medeiros Academic unit of Garanhuns, Universidade Federal Rural de Pernambuco, Garanhuns, PE
  • Gustavo Pereira Duda Academic unit of Garanhuns, Universidade Federal Rural de Pernambuco, Garanhuns, PE
  • Gustavo Pereira Duda Academic unit of Garanhuns, Universidade Federal Rural de Pernambuco, Garanhuns, PE
  • Jamilly Alves de Barros Department of soil. Universidade Federal Rural de Pernambuco, Recife, PE
  • Uemeson José dos Santos Department of nuclear energy, Universidade Federal de Pernambuco, Recife, PE

DOI:

https://doi.org/10.1590/1983-21252017v30n319rc

Keywords:

Manihot esculenta. Fusarium solani. Coffee residue. Extracellular soil enzyme. Microbial community structure.

Abstract

The incorporation of organic matter has been used to manage of diseases caused by soilborne pathogen, but there is a gap in the use of coffee residues on disease supressiveness. The objective of this study was to evaluate the effect of organic matter sources against cassava root rot caused by F. solani CFF109. Fertilization with coffee residue (CR), cattle manure (CM), earthworm excrements (EE) and goat manure (GM) resulted in suppression of cassava root rot. The treatments of CR and CM presented higher reduction in the cassava disease severity. There were changes in the soil microbial community structure by organic matter incorporation, mainly in total fungi and Gram-negative bacteria populations. The total organic carbon and magnesium are negatively associated with disease severity. The microbial quotient, alkaline and acid phosphatase activities were positively and the biomarker a-15:0 was negatively associated with disease severity. This study indicated that agro-industrial residues can be recycled for providing organic matter and nutrients with effect for management of plant diseases by suppressing soilborne pathogens. This is the first evidence that the industrial residue of coffee can be use in the management of cassava root rot, caused by F. solani.

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Published

21-03-2017

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Section

Agronomy