Sources of resistance and epidemiology of white rust of mustard

Sources of resistance and epidemiology of white rust of mustard

1988

A:PS

During four years of testing programme, more than 25 genotypes of rapeseed mustard have been identified possessing high degree of resistance against white rust caused by Albugo candida (Pers. ex Lev.) Ktze. A successful technique to initiate disease in epiphytotic from under field conditions has been developed. Subsequent delay in sowing time after 19 October resulted in the increase of disease intensity of white rust. Rust pustules increased at a faster rale when mean temperature was 11.5 to 12.5 C, mean relative humidity more than 75% and cloudy weather coupled with percipitation and wind velocity at the rate of 2.6 km/h. The infection rate (r) of `white-rust` on different genotypes of mustard varied from 0.09 to 0.45. [AS]

v.41(1):96-99, INDIAN PHYTOPATHOLOGY

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