Soy rust appearances collapse in Brazil state
Incidences of Asian soybean rust (Phakopsora pachyrhizi) have crashed in the Brazilian state of Mato Grosso do Sul in the past eight years, national media report. The number has dropped by some 95% from 613 recorded appearances of the disease to just 31. The fall is due to the implementation of the compulsory 90-day fallow period running each year since 2006 from June 15th to September 15th, researchers conclude. The system was pioneered by Mato Grosso state that year (Agrow No 497, p 16), and rolled out to others including Mato Grosso do Sul the following year (Agrow No 522, p 14). At the start of the policy, the regions of Dourados and Maracaju had 190 and 34 instances recorded by the agricultural research corporation, the Embrapa. In the 2013/14 season, the Embrapa enrolled the aid of researchers, Fundação MS and Fundação Chapadão, and yet encountered just one incidence in each of the same regions.