Uromyces betae

Uromyces betae is a fungal species and plant pathogen infecting beet.
It was originally published as Uredo betae before it was transferred to the Uromyces genus.
Sugar beet rust was first described in Canada in 1935,, and then reported in Europe in 1988.
It is a rust which affects only beet, causing brown-orange spotting of the plant's leaves with rusty pustules of urediniospores at the centre of the spots. The rust can stay on overwintered seed crops or as teliospores which contaminate seed storage.
Severe rust attacks to the crop can cause yield losses. or up to 10% in the United Kingdom.
Other hosts of the fungus includes, sugar beet, beetroot, spinach beet, mangolds and wild beet, Beta vulgaris, Beta cycla and Beta rapa.
It is found in; Africa ; Asia ; Australasia ; Europe ; North America and also in South America.