Variacion en crecimiento, esporulacion y sensibilidad a benlate de aislamientos suramericanos de Colletotrichum gloeosporioides

Badel, Jorge L.; Kelemu, Segenet

[Growth variation, sporulation and sensibility to benlate of isolate sudamericans of Colletotrichum gloeosporioides] | Variacion en crecimiento, esporulacion y sensibilidad a benlate de aislamientos suramericanos de Colletotrichum gloeosporioides

1997

Badel, Jorge L. | Kelemu, Segenet

The mycelial growth, sporulation and sensitivity to the fungicide Benlate of a selected group of Colletotrichum gloeosporioides, the causal agent of anthracnose of Stylosanthes, collected from naturally occurring infection in different regions of South America were studied. The mycelial radial growth ranged from 11.6 to 40.8 mm after 7 days of culturing on oatmeal agar medium (OMA), with a significantly higher growth rate of most isolates collected in Carimagua, Colombia, a selection and breeding site for species of Stylosanthes. No significant difference in sporulation among 70 out of the 77 studied isolates was found. The sensitivity to Benlate, measured as mycelial radial growth after 7 days of culturing on OMA amended with 0.25 pg/ml Benlate-taking the radius as a percent of the control- ranged from 3.6 percent to 79.0 percent with a tendency to a higher sensitivity of the isolates collected in Carimagua. The results confirm the high variability of the South American population of the pathogen.

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