"ROOT ROTS OF ROSELLE CAUSED BY SOME SOIL BORNE FUNGI AND THEIR CONTROL"
Amany Mohamed El-Hareedy Mahmoud;
Abstract
I- Roselle plantations in Giza, Beni-Suief and Sohag goverorates were inspected through three successive seasons for natural infection with root rot diseases. The results indicated that the percentages of natural infection ranged from 17.5 to 32.0 %. Sohag plantations possessed the highest infection, while the lowest was in Beni-Suief (season 2002), being 17.5 %.
2- Reported isolation from rotted roots of roselle plants yielded nine genera of fungi. R. solani, F. solani, and M. phaseolina were the most frequent and also were the most virulent for two roselle cultivars. Light red cultivar assumed more susceptible.
3- Interaction between each pair of the three fungi on PDA medium showed non significant antagonistic or synergistic effects.
4- Mixed inoculum in soil, generally caused increase in percentages of pre-and post emergence damping off. Little differences were existed in plant's height grown in soil inoculated with mixtures as compared with those grown in soil inoculated with each fungus alone.
5- The culture filtrates of R. solani, F. solani or M. phaseolina caused significant reduction in seed germination along the incubation periods. The percentages reduction in seed germination was gradually decreased with the increase of filtrate concentration. The seedling developed in the different treatment exhibited various abnormalities, in particular at higher concentrations. Usually the seedlings were shorter than in the controls
2- Reported isolation from rotted roots of roselle plants yielded nine genera of fungi. R. solani, F. solani, and M. phaseolina were the most frequent and also were the most virulent for two roselle cultivars. Light red cultivar assumed more susceptible.
3- Interaction between each pair of the three fungi on PDA medium showed non significant antagonistic or synergistic effects.
4- Mixed inoculum in soil, generally caused increase in percentages of pre-and post emergence damping off. Little differences were existed in plant's height grown in soil inoculated with mixtures as compared with those grown in soil inoculated with each fungus alone.
5- The culture filtrates of R. solani, F. solani or M. phaseolina caused significant reduction in seed germination along the incubation periods. The percentages reduction in seed germination was gradually decreased with the increase of filtrate concentration. The seedling developed in the different treatment exhibited various abnormalities, in particular at higher concentrations. Usually the seedlings were shorter than in the controls
Other data
| Title | "ROOT ROTS OF ROSELLE CAUSED BY SOME SOIL BORNE FUNGI AND THEIR CONTROL" | Other Titles | اعفان جذور الكركدية المتسببة عن بعض الفطريات الكامنة فى التربة وطرق مكافحتها | Authors | Amany Mohamed El-Hareedy Mahmoud | Issue Date | 2004 |
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