Baseline Sensitivity and Control Efficacy of Various Group of Fungicides against Sclerotinia sclerotiorum in Oilseed Rape Cultivation

Sclerotinia stem rot (SSR), caused by sclerotiorum, is a devastating disease of oilseed rape that may cause significant yield losses if not controlled cultural management strategies and fungicide applications. Studies were conducted to evaluate the efficacy different group fungicides as well biopesticide, including azoxystrobin, boscalid, fludioxonil, prothioconazole, tebuconazole, azoxystrobin/tebuconazole, boscalid/pyraclostrobin, prothioconazole/fluopyram Bacillus amyloliquefaciens, on baseline sensitivity S. sclerotiorum isolates under in-vitro conditions control SSR in field. Artificial inoculation mist irrigation prompt reproducible infection cultivation. All compounds significantly reduced 36.7% 86.9% severity increased 55.2% 98.7% yield, 1.5% 7.0% thousand grain-weight, 5.9% oil 0.1% 1.3% protein content. Fludioxonil, boscalid/pyraclostrobin fluopyram/prothioconazole achieved strongest fungicidal activity against SSR. The biopesticide provided 36% control. Under vitro conditions, B. amyloliquefaciens only strongly inhibited mycelial growth but also formation sclerotia all concentrations. Boscalid fludioxonil exhibited highest level with mean EC50 values 1.23 1.60 ?g a.s. mL?1. variability between was observed towards prothioconazole azoxystrobin.