Puccinia graminis f. sp. tritici. Photo by Mary Burrows, Montana State University, Bugwood.org. Survey Information. Black stem rust (Ug99) Puccinia graminis f.sp. tritici (Ug99) is a serious disease ...

Ordinarily, stem-rust spores move only short distances, one stem infecting another as they brush against each other. However, Ug99 makes five distinct types of spores.

A new race of the virulent cereal black stem rust disease, or Ug99, is spreading rapidly across Africa and South Asia and poses a major threat to global wheat and barley yields. The disease, caused by ...

You might not have heard of “stem rust,” a fungus that attacks wheat and can wipe out entire fields of grain. It’s been around for centuries, and was responsible for wiping out 40% of the U ...

Diseases that ravage wheat fields are as old as time itself. The ancient Romans even had a legend to explain the terrible plagues.

THE last few seasons have been notable for attacks of black or stem rust (Puccinia graminis) on cereals in the south-east of Scotland. The rust was particularly widespread and severe in 1947. It ...

As new agricultural areas opened across Australia, wheat became our primary crop and eventually an export commodity.

Since then, stem rust has been observed at several locations, generally affecting just one to two plants in each case. But this all changed last summer when it was the most widespread since 1955.

Wheat rust can turn a healthy crop into a black, tangled mess of broken stems and shriveled grains just weeks before harvest. RUSTED WHEAT With the recent reemergence of stem rust ...