Mango malformation disease in Egypt. 1. Electron microscopy, effect of antibiotic, culturing and serological studies.
Kishtah A. A., Nyland G., Nasr El-Din T. M., Tolba M. A., Lowe S. K., Khalil E. M., Tadros M. R., El-Amrety A.
Author Affiliation: Inst. Phytopath., Agric. Res. Cent., Giza, Egypt.
Egyptian Journal of Phytopathology 17 : 151-157
Abstract : No virus particles could be detected in sap or thin sections of seedlings or trees with this disease. Electron microscopy of thin sections of petals, leaf midribs and fine roots from malformed mango trees failed to reveal signs of any pathogen in phloem or xylem tissues. Treatment of malformed trees and seedlings with oxytetracycline HCL did not prevent or inhibit malformation of vegetative or floral growth. Culturing an extract of malformed tissue did not change the red colour of PPLO medium. Results were negative when such extracts were tested by ELISA with conjugated antisera of Spiroplasma citri, corn stunt spiroplasma and the causal agents of peach yellow leaf roll and aster yellows.