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Survival of Corynespora cassiicola in sesame seeds under two storage temperatures.

Navas, M.; Subero, L. J.;

Anales de Botanica Agricola Year: 1995 Vol: 2 Pages: 16-19 Ref: 22 ref.

1995

บทคัดย่อ

Survival of Corynespora cassiicola in sesame seeds under two storage temperatures.

 

Target spot of sesame (Sesamum indicum) caused by C. cassiicola is one of the most important diseases of this crop in Venezuela, particularly during the wet season. The pathogen is frequently found in seed and its transmission by seed is very effective. To determine fungal survival in seed during storage, 2 seed samples of sesame cultivar Arawaca were stored in cloth bags at 5 plus or minus 1 deg C and 60% RH, and 26 plus or minus 2 deg and 50% RH, respectively, for 10 months. Every month, seed infection and germination were evaluated using a blotter test. In seed stored at 26 plus or minus 2 deg and 50% RH, infection decreased rapidly from 89.8 to 8% in 7 months. In 10 months, the fungus was completely inactive. In seed stored at 5 plus or minus 1 deg and 60% RH, the percentage of infected seed decreased more slowly, from 89.8 to 62% in 10 months. Seed germination in both storage conditions was 88 and 90% by the end of the experiment.