African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6574

Full Length Research Paper

Organic-matter effects on populations of dry rot of yam nematodes

Ana Caroline de Melo Morais
  • Ana Caroline de Melo Morais
  • Centro de Ciências Agrárias, Universidade Federal de Alagoas, Rio Largo, AL, Brazil.
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Maria de Fátima Silva Muniz*
  • Maria de Fátima Silva Muniz*
  • Centro de Ciências Agrárias, Universidade Federal de Alagoas, Rio Largo, AL, Brazil.
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Rosangela da Silva Lima
  • Rosangela da Silva Lima
  • Centro de Ciências Agrárias, Universidade Federal de Alagoas, Rio Largo, AL, Brazil.
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Gilson Moura Filho
  • Gilson Moura Filho
  • Centro de Ciências Agrárias, Universidade Federal de Alagoas, Rio Largo, AL, Brazil.
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José Mauro da Cunha e Castro
  • José Mauro da Cunha e Castro
  • Embrapa Semiárido, Petrolina, PE, Brazil.
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  •  Received: 06 February 2016
  •  Accepted: 17 March 2016
  •  Published: 28 April 2016

Abstract

The objective of this study was to evaluate the effect of organic-matter incorporated into the soil on population densities of the causal agents of the dry rot disease of yam, under field conditions. The experiment was performed in a natural infested area with a mixed population of Pratylenchus coffeae and Scutellonema bradys, in Quebrangulo county (Alagoas state, Brazil) in a randomized block design with five treatments and five replicates. The sources of organic matter used as soil amendments were: coconut husk powder, castor bean cake, cattle manure and chicken manure. Non amended soil was used as a control. Nine months after planting, the tubers were harvested. No statistical differences were found among disease incidence, yam production and nematode population densities in the soil. However, the application of chicken manure reduced P. coffeae population in tubers.

Key words: Dioscorea spp., Scutellonema bradys, Pratylenchus coffeae, nematode management.