Variation in Sensitivity Among Some Isolates of Macrophomina phaseolina Isolated from Cotton Roots to Flutolanil Fungicide
Mycobiology
;
: 99-103, 2006.
Artigo
em Inglês
| WPRIM
| ID: wpr-729267
ABSTRACT
Toxicity of the fungicide Flutolanil was in vitro tested against 20 isolates of Macrophomina phaseolina and cotton seedlings of ten commercial cotton cultivars. The isolates were recovered from roots of cotton plants obtained from different cotton-growing areas in Egypt. Most of the tested isolates were sensitive to Flutolanil; however, they varied in sensitivity. Twenty-five percent of the isolates were highly sensitive where IC50 ranged from 100 microg/ml. Flutolanil was very safe on both shoots and roots of the tested cultivars (IC50 > 100 microg/ml). Treating cotton seeds with Flutolanil resulted in highly significant (P < 0.01) reductions in pathogenicity of 18 isolates and a significant reduction (P < 0.05) in pathogenicity of isolate M29. M1 was the only isolate, which was insensitive to the application of Flutolanil. In vivo toxicity to Flutolanil was not correlated with its in vitro toxicity. However, a highly significant correlation (r = 0.60, P < 0.01) was observed between pathogenicity of isolates and the in vivo toxicity of the fungicide.
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Assunto principal:
Virulência
/
Gossypium
/
Concentração Inibidora 50
/
Plântula
/
Egito
Tipo de estudo:
Estudo diagnóstico
País/Região como assunto:
África
Idioma:
Inglês
Revista:
Mycobiology
Ano de publicação:
2006
Tipo de documento:
Artigo
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