Interações entre Fusarium solani f. sp. phaseoli e Rhizoctonia solani na severidade da podridão radicular do feijoeiro
Carregando...
Data
2009-03
Título da Revista
ISSN da Revista
Título de Volume
Editor
João Batista Duarte
Resumo
The present work aimed to evaluate the effect of inoculum
densities of Fusarium solani f. sp. phaseoli (Fsp) and Rhizoctonia
solani (Rs) and their interactions on the severity of root rot and
on the dry mass of bean plants. Soil was infested by the addition
of Rs or Fsp-colonized sorghum seeds, in the amounts of 0.00 g;
0.06 g; 0.12 g; 0.25 g; 0.50 g; and 1.00 g for Rs, and 0 g; 1g;
2 g; 4 g; 8 g; and 16 g for Fsp per pot (1.4 kg of soil). The
densities used for the joint soil infestations with both pathogens
were the same used in the separate pathogen infestations. A
progressive rise in the severity of root rots was observed with
the increase of inoculum density for both pathogens. Maximum
disease severities for Rs were 67% and 22%, in separate or
combined infections with Fsp, respectively. Maximum disease
severities with Fusarium were 14% and 38%, in separate or
combined infections with Rs, respectively. The results suggest
that Rhizoctonia solani stimulated the expression of symptoms
of Fusarium solani f. sp. phaseoli, while Fsp inhibited the
expression of symptoms caused by Rs. Negative correlations
between the inoculum density and bean dry weight were generally
observed, except for the single infestation with Fsp.
Descrição
Palavras-chave
Fungo de solo, Doenças do feijão, Infestação do solo, Soilborne fungus, Bean diseases, Soil infestation
Citação
SOUZA, Eliane Divina de Tolêdo; LOBO JÚNIOR, Murillo; SILVEIRA, Pedro Marques da; CAFÉ FILHO, Adalberto Corrêa. Interações entre Fusarium solani f. sp. phaseoli e Rhizoctonia solani na severidade da podridão radicular do feijoeiro. Pesquisa Agropecuária Tropical, Goiânia, v. 39, n. 1, p. 13-17, jan./mar. 2009. Disponível em: <https://www.revistas.ufg.br/pat/article/view/3507/4467>.