Sensitivity of some Fusarium species to fungicides and Trichoderma isolates | ||
| Journal of Pest Control and Environmental Sciences | ||
| Volume 13, Issue 1, June 2005, Pages 117-131 PDF (413.48 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jpces.2005.459506 | ||
| Authors | ||
| Soad M. Ahmed* 1; Amal A. H. Hemada2 | ||
| 1Pesticide Chemistry Dept., Fac. of Agric. (Elshatby), Alex. Univ. Egypt | ||
| 2Plant Pathology Dept., Fac- of Agric. (Elshatby), Alex- Univ. Egypt | ||
| Abstract | ||
| Three laboratory experiments were done in order to assess the efiéctiveness of both most commonly used fungicides and Trichoderma Isolates against pathogenic Fusarium spp., as well as the interaction between fungicides and Trichoderma isolates. In the first one: Eighteen of commonly used fungicides as chemical control for Fusarium diseases (thiabendazoie, thiophanate-methyl, imazalil, monceren, carboxin. vitavax-200, vitavax-300, captan, tolclofos-methyl, iriadimefon, penconazole, propconazole, hexaconazole, mancozeb, ridomil MZ, ridomil plus, iprodione and homal) were evaluated against eight species of Fusarium which cause Fusarium diseases of different legumes (Fusarium oxysporum f.sp. phaseoli, E solani f.sp.phaseoli from bean seeds "F 1, F2"; F. oxysporum f.sp lupini, E. solani f.sp.lupini from luprne seeds "F3, F4"; F oxysporum f.sp cicens, F. solani f.sp ciceris from chickpea seeds "F5, F6" and E monliforme, F. solani from cowpea seeds "F7, F8"). The results in this part showed that Imamlil was extremely highly effective fungicide since the EC50 values for all tested Fusarium species were ranged from less than 0.1 µg ml-1 to 0.22 µg ml-1 Thiabendazole, homai, and thiophanate-methyl were highly effective fungicides with EC50 values less than 10 µg ml-1 (0.03 µg ml-1 for thiabendazole against F2 and 6.05 µg ml-I for homai against F7), and generally we can arrange the eight species of Fusarium according to their sensitivity to the tested fungicides in ascending order as follows: Fl, F8, F4. F2, F6, F5, F3, and F7. In the second part of work: efficacy of biological antagonists was studied by using twenty four isolates of Trichoderma against the eight species of Fusarium, and we found that most cf the Trichoderma isolates had antagonistic effect against most of the tested Fusarium species. Finally we examined the most effective tested fungicides against the most antagonists of Trichoderma against Fusarium species, The data revealed that most of Trichoderma isolates are Insensitive (tolerant) han tungi of Fusarium sop, to the tested fungicides. Imazalil was the most suitable fungicide because it was highly effective fungicide against Fusarium species (pathogenic fungi), while the Trichoderma (non pathogenic fungi) are insensitive to it without any exceptions, followed by thiabendazole with only one exception. | ||
| Keywords | ||
| Fusarium species; Fungicides; Trichoderma isolates; Antagonistic activity | ||
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