SUPPRESSION OF FUSARIUM WILT OF TOMATO BY CHITOSAN INVOLVING BOTH ANTIFUNGAL ACTIVITY AND ROOT PROTECTION. | ||
| Assiut Journal of Agricultural Sciences | ||
| Article 10, Volume 37, Issue 3, October 2006, Pages 141-151 PDF (619.17 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/ajas.2006.274632 | ||
| Authors | ||
| Amal M. I. Eraky; F. G. Fahmy | ||
| Plant Pathology Dept., Faculty of Agric., Assiut University, Assiut, Egypt | ||
| Abstract | ||
| Pathogenicity tests of five Fusarium oxysporum f. sp. lycopersici (FOL) isolates on five tomato cultivars revealed that the foliar yellowing and vascular browning were produced by all isolates, however, the isolates differed in their degree of virulence. Isolate No. 1 was the most aggressive one in inducing the disease in tomato plants. Tomato cultivars reacted differently to the infection by Fusarium isolates. Pritchard cv. was the most susceptible, while, Supper Marmande cv. gave the highest level of resistance. In vitro, using chitosan as antifungal agent with concentration of 1000 ppm significantly inhibited the myclial growth of all tested Fusarium isolates. In greenhouse experiments, the treatment of tomato seeds or transplants roots with chitosan at concentration of 500 and 1000 ppm reduced both foliar yellowing and vascular browning incidence of tomato plants growing in soil infested with FOL (Isolate No. 1).The treatment of transplants roots by chitosan was more effective than the treatment of seeds. | ||
| Keywords | ||
| fusarium; tomato wilt; chitosan | ||
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