Soy rust spreading faster in this year's Brazil crop
Asian soybean rust (Phakopsora pachyrhizi) is spreading more rapidly in the 2013/14 Brazilian soybean crop than last year's, Mato Grosso state soybean research institute Fundacao MT reports. Despite a later initial appearance in the major soybean-growing state, Mato Grosso, it has been detected in five states as weather conditions have been poor. Another association claimed that the first appearance came earlier this year (Agrow No 678, p 22). Researchers are adding recommendations on fungicide applications, particularly that mixtures of strobilurins with either triazoles or carboxamides be applied. Brazilian farmers spent $1,300 million on treating soybeans against rust in 2011, accounting for more than half (56%) of the fungicide market (Agrow No 646, p 22).