Relationship between different resistance parameters in french bean to floury leaf spot caused by Mycovellosiella phaseoli (Drummond) Deighton
1996
Sharma, K.D. | Kaushal, R.P. | Singh, B.M.
Eighty-nine germplasm lines of french bean (Phaseolus vulgaris) consisting of local and exotic collections were tested for components of resistance including lesion number, lesion size and halo size in 2 years. The parameters lesion size and 'halo' size were strongly correlated. Lesions were always larger than halos; however, accession EC 285577 designated as highly susceptible on the basis of number of lesions, had restricted lesions with exceptionally large halos. Only EC 285550 and EC 285556 were resistant to floury leaf spot, and EC 285549 and EC 285572 were moderately resistant. The disease appeared late in resistant as well as in moderately resistant lines in comparison to the highly susceptible line EC 285578.
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