Scientists gain in struggle against wheat rust

Researchers are deploying new wheat varieties with an array of resistant genes they hope will baffle and defeat Ug99, a highly dangerous fungus leapfrogging through wheat fields in Africa and Asia.

"Significant progress has been made," plant geneticist Ravi Singh and collaborators said in a paper presented Tuesday to leading international wheat experts at a four-day conference on combating the re-emerged, mutant form of stem rust, an old plant disease.

Scientists still spoke of a potential agricultural disaster.

"A global food crisis is still a distinct possibility if governments and international institutions fail to support this …