Host plant resistance in blackgram against charcoal rot (Macrophomina phaseolina (Tassi) Goid)

Abstract

One hundred blackgram (Vigna mungo L.) germplasm accessions were evaluated for resistance against charcoal rot caused by Macrophomina phaseolina under artificially created disease conditions in greenhouse as well as in the field at National Agricultural Research Centre (NARC), Islamabad. The disease at seedling stage in green house and at reproductive stage in the field was recorded using 1-9 ratting scale. The genotypic response to disease development was quite variable both in the field and green house. At seedling stage, 5 genotypes appeared to be highly resistant, 11 resistant and 30 tolerant in green house whereas rest of the 54 genotypes showed susceptible to highly susceptible response. Twelve genotypes were found to be highly resistant, 17 resistant and 25 as tolerant, whereas 16 genotypes appeared to be susceptible and 30 highly susceptible under field conditions. Three genotypes viz., 013468, 013663 and 013468 showed resistance both at seedling and reproductive stages. These lines can further be exploited as a source of resistance against charcoal rot in mash