ISHS Acta Horticulturae 153: IX African Symposium on Horticultural Crops
THE NATURE AND SIGNIFICANCE OF TRANSMISSION OF ISARIOPSIS GRISEOLA SACC. THROUGH THE SEED OF BEANS (PHASEOLUS VULGARIS L.). |
| Author: | R.A. Buruchara |
| Abstract:
Seeds harvested from a severe angular leaf spot infection of bean leaves and pods were tested for infection by Isariopsis griscola. The fungus was isolated from only 8 out of a batch of 250 seeds. Fungal growth was only on the hilum, although discolouration and shrivelling occurred elsewhere near the lesions. No fungus was isolated from a similar batch of 250 seeds whose seed coats had been previously removed. None of the 1000 plants grown in the greenhouse from seeds of infected pods showed symptoms of angular leaf spot disease on either the stem or the leaves, even after two months. Neither the coleoptile nor the primary leaves growing from the infected seeds developed symptoms following germination. | |
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