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Epidemiology of brown rust and yellow rust of wheat in north india part 3 impact of varietal change


, : Epidemiology of brown rust and yellow rust of wheat in north india part 3 impact of varietal change. Plant Disease Reporter 62(8): 694-698

A change in the varietal composition of wheat during 1973-1975 throughout the Indo-Gangetic plain delayed and lessened development of brown [Puccinia recondita f. sp. tritici] and yellow rust [P. striiformis]. This varietal change possibly averted a severe rust epidemic that would otherwise have occurred in 1975. In the broader sense, rust epidemics may be checked by frequent varietal changes in both the area where the disease oversummers and where it does not, if this is accompanied with diversification of sources of resistance.

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Related references

Joshi, L.M.; Nagarajan, S.; Srivastava, K.D., 1977: Epidemiology of brown rust and yellow rust of wheat in north india part 1 place and time of appearance and spread. The primary infection foci of brown rust, Puccinia recondita f. sp. tritici are active along the Himalayas, mainly in the central and eastern parts. The rust spreads as far as 270 km into parts of northeast India. The uredospores further spread to...

Nagarajan, S.; Joshi, L.M.; Srivastava, K.D.; Singh, D.V., 1978: Epidemiology of brown and yellow rusts of wheat in north India. III. Impact of varietal change. Data are presented showing that, after the epiphytotics of Puccinia recondita and P. striiformis of 1972 and 1973, the replacement of Kalyan Sona in the Punjab by Sonalika and the dwarfs WG357, WG377 and HD2009, the extensive cultivation of Sonali...

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