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2000 2011 59 286-9 2012 30 667-73 2015 1999 12 - 16 september 1999 AUS 62-6 2002 2014 1977 2002 50 86-90 2014 1999 13 747-52 1988 25 977-88 1988 25 989-97 2001 1998 1980 2001 1970 18 614-6 Sistema Fitosanitario del Estado 2014 2007 University of the Philippines 1975 2010 2002 42 342-50 Weed Science Society of America 1998 12 789