The relationship of Cotton leaf roll vitus (CLRV) from Thailand to Cotton leafroll dwarf virus(CLRDV) from Brazil or Cotton bunchy top virus (CBTV) from Australia is unclear as no sequence information is currently pub

Cotton production is an important rural industry in Australia. Disease pressure from emerging pathogens such as Thielaviopsis basicola threatens to reduce production.

A widespread problem of premature defoliation and physiological cut out of cotton has occurred in the Emerald Irrigation Area since the early 1980s. The problem was particularly severe in 1988 and 1989.

The fungus Colletotrichum orbiculare(Berk. et Mont.) v. Arx (Walker and Nikandrow, unpublished data) was found causing anthracnose on X.