Selection of fungi with biocontrol potential against the black spot disease of papaya

Authors

  • Janieli Maganha Silva Vivas Universidade Estadual do Norte Fluminense Darcy Ribeiro
  • Silvaldo Felipe da Silveira Universidade Estadual do Norte Fluminense Darcy Ribeiro
  • Pedro Henrique Dias dos Santos Universidade Estadual do Norte Fluminense Darcy Ribeiro
  • Danilo Batista Pinho Universidade de Brasília
  • Olinto Liparini Pereira Universidade de Viçosa

Keywords:

Carica papaya, Asperisporium caricae, Acremonium spp., Hansfordia pulvinata.

Abstract

The use of fungicides is the main control measure against the black-spot disease of papaya. The biological control is an alternative to that, being the selection of mycoparasitic fungi the first step in programs aiming at this kind of control. This study aimed to obtain and select fungi with potential to the biocontrol of the black spot disease of papaya. For this purpose, 24 isolates were collected from different regions and pathosystems, and then identified morphologically and by the ITS region sequencing. In order to evaluate the mycoparasite potential, two assessments, in a randomized block design, with three replications, were carried out in a shadehouse, being the obtained isolates inoculated on papaya leaves with black spot lesions. The average time for the appearance of mycoparasitism signs and the incidence of mycoparasitized black spot lesions were evaluated. Of the 24 isolates obtained, ten were from Hansfordia pulvinata, two from Lecanicillium lecaniium, two from Simplicillium lanossoniveum, one from Sarocladium implicatum and nine from Acremonium spp. A wide variability, concerning the mycoparasitism on black spot lesions, was observed, especially for the isolates H-611, H-613, H-614 and H-615, which showed the highest colonization averages. The results demonstrate that H. pulvinata has a great potential to be used as a biocontrol agent against Asperisporium caricae.

Downloads

Download data is not yet available.

Downloads

Published

2017-11-30

How to Cite

VIVAS, J. M. S.; SILVEIRA, S. F. da; SANTOS, P. H. D. dos; PINHO, D. B.; PEREIRA, O. L. Selection of fungi with biocontrol potential against the black spot disease of papaya. Pesquisa Agropecuária Tropical [Agricultural Research in the Tropics], Goiânia, v. 47, n. 4, p. 369–376, 2017. Disponível em: https://revistas.ufg.br/pat/article/view/49178. Acesso em: 22 nov. 2024.

Issue

v. 47, n. 4, Oct./Dec. 2017

Section

Research Article

License

Authors will not be paid for published articles and must waive their copyright in favor of the PAT journal. On the other hand, they are solely responsible for the content of those articles, even if the Editor holds the right to adjust them to the norms of the journal. Authors are allowed to publish their articles simultaneously in their institutional repositories, as soon as the original publication at the PAT journal is mentioned.