… sugar-sweetened tostadas made from native corn and flavored with … two major threats to criolla [native] seeds today,” said Fuentes. … , others continue to sow native crops but take advantage of … farmer from the mountainous La Cañada region who admitted to …… sugar-sweetened tostadas made from native corn and flavored with … two major threats to criolla [native] seeds today,” said Fuentes. … , others continue to sow native crops but take advantage of … farmer from the mountainous La Cañada region who admitted to …