Abstract

The Rust of Coffee caused by the fungus Hemileia vastatrix is the most important among Coffee diseases and is known to cause heavy losses to the crop in almost all the Coffee- growing countries of the world. The fungus has been responsible for the abandonment of several thousands of acres of Coffee in South India and Ceylon, and this fact alone has gained for it classic importance in Mycological literature. Of recent years, the Coffee industry in Java has been saved from ruin by the introduction of resistant species and varieties which are gradually replacing the susceptible ones. In India, as in other countries, there is an ever-growing demand among Coffee growers for resis- tant varieties and strains which combine in them such qualities as good setting of blossom, a high out-turn of parchment, and a bean of good flavour.

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