DETECTION OF PETUNIA PHYTOPLASMA IN ELMANSOURA - DAKAHLIA, EGYPT | ||||
| Journal of Plant Production | ||||
| Article 10, Volume 29, Issue 5, May 2004, Page 2513-2519 PDF (393.75 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jpp.2004.238635 | ||||
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| Author | ||||
| M. A. EI-Mazaty, | ||||
| Plant Pathology Department, Faculty of Agric., EJ-Mansoura Univ., Egypt. | ||||
| Abstract | ||||
| Phytoplasma like symptoms. foliar yellowing. witches' broom and phyllody were observed on diseased petunia hybrid vilm. In the gardens of EI-Mansoura University. Egypt. Grafting had been succeeded in transmitting the causal agent but not by infectious crud sap inoculation or by the aphid Myzus persice«. Light microscopy of dienes stained free hand section revealed staining of cambium with blue colore. Electron microscopy study confirmed the presence of phytoplasma in phloeim of diseased petunia flower petioles. Phytoplasm bodies were pleomorphic and they were not found in phloeim of healthy plants. Results showed that spraying diseased petunia twice with oxytetracycline (200 ppm) caused disease recovery. | ||||
| Keywords | ||||
| Phytoplasma; petunia; symptoms; detection; dienes' staining; histology and Electron microscopy | ||||
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