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The role of Tricoderma harzianum Rafai and iron and manganese elements on the protection of tomato seeds and seedlings from infection by some pathogenic fungi | ||
| journal of al-qadisiyah for pure science(quarterly) | ||
| Article 1, Volume 9, Issue 1, 2009, Pages 8-15 PDF (0 K) | ||
| Author | ||
| Aqeel N. AL- Kaaby | ||
| Abstract | ||
| This experiment was conducted to evaluate the efficiency of Tricoderma harzianum , iron and manganese elements and their interaction on control seeds decay and damping off tomato seedlings disease caused by fungi Rhizoctonia solani and Fusarium solani. . Results showed that , the addition of nutritive elements Fe and Mn at different concentrations to the medium of P.D.A. have different effects on growth fungi T. harzianum , R. solani and F. solani . It was found that the addition of Mn with concentration of 1 gm commercial part / L medium encouraged the growth of fungus T. harzianum and inhibited the growth of fungus R. solani , while , the concentration 2 gm commercial part / L. has the most effective reduction in the growth of F. solani , it reached 2.25 cm compared with 5.08 cm for control treatment. Results also showed that fungus T. harzianum produced high ability to reduce the rates of growth of both fungi R. solani and F. solani in medium that treated by Mn and Fe , which significantly different from the control treatment that reached growth of pathogenic fungi to 9.0 and 8.23 cm , respectively. The interaction between T. harzianum and nutritive elements was highly effected in protecting seeds and seedlings of tomato from the infection pathogenic fungi and transactions were more effective in protecting seeds and seedlings from infection fungi R. solani and F. solani that treated with T. harzianum and Mn , led to an increase of seeds germination percentage to 73.33 , 65.67 % and reduce the number of seeds decay to 26.67 , 23.34 % and an increase in the dry weight of plants . All those indicator ions were different to the control treatment containing pathogenic fungi alone . | ||
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