VARIATION IN SENSITIVITY TO FUNUGICIDES AMONG ISOLATES OF Macrophomina phaseolina FROM COTTON ROOTS | ||
| Journal of Plant Production | ||
| Article 5, Volume 32, Issue 12, December 2007, Pages 9987-9998 PDF (445.37 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jpp.2007.221246 | ||
| Authors | ||
| M. A. Abdel-Sattar,1; A. A. Aly2; M. R. Omar2 | ||
| 1Dept. of Agric. Bot., Fac. of Agric., Suez Canal Univ., Ismailia, Egypt. | ||
| 2Plant Pathology Research Institute, Agric. Res. Center, Giza, Egypt. | ||
| Abstract | ||
| Twenty isolates of Macrophomina phaseolina from cotton roots were evaluated in vivo for sensitivity to the seed-dressing fungicides Monceren, Monceren T, Rizolex T, Vitavax 200, and Maxim AP. Monceren and Rizolex T were the best performing fungicides in suppressing M. phaseolina under greenhouse conditions. This superiority was attributed to the following reasons: first, they were effective in increasing the percentage of surviving seedlings by 203.09 and 170.10%, respectively, regardless of the tested isolate. Second, they were also effective in increasing the height of surviving seedlings by 93.21 and 62.57%, respectively. Third, Monceren and Rizolex T were effective in increasing the dry weight of surviving seedlings in 50 and 40% of the tested isolates, respectively. A high significant positive correlation was observed between pathogenicity of isolates and their sensitivity to fungicides. | ||
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