Comparative Study of Inoculation Methods in Sclerotinia sclerotiorum in Rapeseed-mustard

摘要

Sclerotinia rot of mustard caused by Sclerotinia sclerotiorum (Lib.) de Bary, is commonly occur in cool climate. Earlier it was considered minor disease but since last few successive years it has become a serious problem in India. Sclerotinia is a polyphagous soil borne pathogen which survives in soil up to 10 years in the form of sclerotia under adverse conditions. Abawi and Grogan (1979) reported that infection on above ground plant parts resulted from ascosporic inoculum, whereas soil line infection result either from ascospores or sclerotia. However, infection below the ground is generally due to mycelial germination of soil borne sclerotia.