Sandhu, P.S.Yadav, Monika2024-01-082024-01-082023Yadav, Monika (2023). Management Of Sclerotinia Stem Rot Of Rapeseed-Mustard Incited By Sclerotinia Sclerotiorum (Lib.) De Bary (Unpublished M.Sc. thesis). Punjab Agricultural University, Ludhiana, Punjab, India.https://krishikosh.egranth.ac.in/handle/1/5810205970Sclerotinia stem rot caused by Sclerotinia sclerotiorum, is an important fungal disease of rapeseed and mustard crop because of its destructive nature. In the present study, 112 genotypes of rapeseed-mustard screened against stem rot disease. Ten genotypes (EC223400, EC765482, IC268306, IC296703, IC491169, IC491178, IC491197, IC491290, IC531377 and IC538699) were found moderately resistant to the pathogen. Early sowing of brassica during first week of October results in lower incidence of the disease and higher yield compare to the late sowings. Poison food technique was used to evaluate botanicals and fungicides under in vitro condition. Among the botanicals maximum per cent inhibition in mycelial growth was observed in case of Chenopodium album at 20 per cent concentration. Whereas, in case of fungicides complete inhibition (100%) was observed in combination fungicides picoxystrobin 7.05%+ propiconazole 11.7% w/w SC, azoxystrobin18.2% w/w + difenoconazole 11.4% w/w SC and fluopyrum 17.7% w/w + tebuconazole 17.7% w/w SC at a concentration of 5, 10 and 25 ppm, respectively. Under in vitro conditions, combination fungicides were more effective against S. sclerotiorum compared to contact fungicide mancozeb 75 % WP which resulted in lower inhibition of pathogen growth even at higher concentrations. The same set of botanicals and fungicides were used under in vivo conditions as a foliar spray application. Chenopodium album at 40 % concentration was observed most effective in reducing the per cent lesion length as compared to the control. Combination fungicide picoxystrobin7.05%+ propiconazole 11.7% w/w SC resulted in lower lesion length development and highest yield as compare to the control in Brassica juncea var. RLC 3.EnglishThesis