Determination of slow white rusting response of Indian mustard genotypes to white rust
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Authors
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Annu
Krishi Vigyan Kendra Fatehabad, CCS Haryana Agricultural University, Hisar- 125 004 Haryana, India
Author
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SK Singh
Krishi Vigyan Kendra Fatehabad, CCS Haryana Agricultural University, Hisar- 125 004 Haryana, India
Author
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AS Rathi
Department of Plant Pathology, CCS Haryana Agricultural University, Hisar- 125 004 Haryana
Author
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R Avtar
Department of Genetics & Plant Breeding, CCS Haryana Agricultural University, Hisar- 125 004 Haryana, India
Author
Keywords:
Albugo candida, slow white rusting, Indian mustard, white rustAbstract
Slow rusting resistance to white rusting (Albugo candida) in twenty two Indian mustard (Brassica juncea) genotypes
was determined through two epidemiological parameters, disease severity (%) and area under disease progress curve
(AUDPC) and four components of resistance (incubation period, latent periods, number of pustules per leaf and pustule
size) under artificial inoculation in field. A considerable range of variations for slow rusting and its components were
found among all the twenty two Indian mustard genotypes inoculated with Albugo candida during rabi 2017-18 and
2018-19. Out of these nine genotypes viz., RH 1556, RH 1569, RH 1573, RH 1799-30, PHR-2, EC 322091, EC 399301, DOMO
4 and ZEM 2 showed lesser size of pustules in range of 0.83 to 1.58 mm and less numbers of pustules per leaf in a range
of 24.17 to 51.50 indicating slow white rusting development. Genotypes viz., RH 1400, RH 1556, RH 1569, RH 1573, RH
1799-30, PHR-2, EC 322091, EC 399301, DOMO-4 and ZEM 2 also showed improved resistance against white rust disease
as these genotypes had low level of disease severity in range of 5.28 to 10.00 per cent and also low values of AUDPC
ranging between 12.07 to 30.64 cm2 indicating slow white rusting behavior.
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