A soybean leaf contaminated with Asian soy rust is pictured through a magnifying lupe, in a experimental plantation in Sorriso, in the central Brazilian state of Mato Grosso, March 19, 2004. Brazil, the world's second largest producer of soybeans, will have its yields reduced in the 2003/2004 crop due to problems with adverse climate conditions and diseases such as Asian soy rust. REUTERS/Paulo Whitaker PW