The world over wherever wheat is grown it is known to be infected by 'rusts' which occasion considerable losses. Three kinds of rusts have been observed on this useful cereal:-yellow rust caused by Puccinia glumarum, black rust brought on by Puccinia graminis and orange rust due to Puccinia triticina. The two latter are world wide in their distribution while the former has not been recorded from South Africa or Australia. All the three however have been observed in India. In this paper are recorded some of the observations made during 1926-27 on the Central Farm, Coimbatore on a wheat crop which was badly affected by orange rust.
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