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Effect of some fungicides against the growth inhibition of Sclerotinia sclerotiorum mycelial compatibility groups

100%

Dalili A., Bakhtiari S., Barari H., Aldaghi M.

Journal of Plant Protection Research

2015

tom 55

nr 4

Sclerotinia sclerotiorum (Lib.) de Bary, the causal agent of Sclerotinia stem rot, is one of the most important pathogens of Brassica napus L. in northern Iran. In this study, 13 mycelial compatibility groups (MCGs) of the fungus were identified among 31 isolates sampled from four regions of Mazandaran province, Iran. Effective fungicides are useful in the integrated management of the disease. So, the effect of tebuconazole, propiconazole, cyproconazole, and Rovral-TS at five doses (0.0001, 0.001, 0.01, 0.1, and 1 ppm) was studied on the growth inhibition of S. sclerotiorum as in vitro tests. Maximum inhibition (100%) of S. sclerotiorum mycelial growth was obtained by the highest dose (1 ppm) of all tested fungicides, as well as by the doses of 0.1 and 0.01 ppm of propiconazole, cyproconazole, and tebuconazole. In this investigation, the reaction of S. sclerotiorum isolates belonging to different MCGs was evaluated against tebuconazole, propiconazole, cyproconazole, and Rovral-TS at their EC50 ranges. The results revealed that there was high variation of S. sclerotiorum MCGs against different fungicides. The inhibition percentage varied between 4.29% and 71.72%.

Ograniczanie wyników

1 Journal of Plant Protection Research

1 Aldaghi M.

1 Bakhtiari S.

1 Barari H.

1 Dalili A.

1 2015

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Effect of some fungicides against the growth inhibition of Sclerotinia sclerotiorum mycelial compatibility groups