Black leaf streak disease of bananas (Mycosphaerella fijiensis): symptoms of disease in Hawaii, and notes on the conidial state of the causal fungus 

 -  Trans. Br. mycol. Soc., 52(3), p.459-476, 1969 .
<br/><br/> Surveys ofbananas in the Hawaiian Islands failed to reveal typical symptoms of Sigatoka disease and its causal fungus Mycosphaerella musicola Leach. However, a similar form of leaf-spot disease is widespread and sometimes very severe. Evidence is presented showing that this disease is the same as 'black leaf streak', first recorded in 1963 in Fiji, caused by M.fijiensis (unpublished). Symptoms of black leaf streak in Hawaii are described, and the first detailed account of the conidial (Cercospora)state of M. fijiensis is given. The conidial state of M. fijiensis is contrasted with that of M. musicola, and with other Cercospora species recorded on bananas. Preliminary observations on spermogonia, perithecia, and ascospores of M. fijiensis are noted. Possibilities concerning the origin of black leaf streak disease in the Pacific region are discussed.