the barding difficulty for virulent and malefic are 160 on here but uoguide.com and uo.stratics barding difficulty calculator both have them lower not sure if this is correct or not
http://www.uoguide.com/Malefic
http://www.uoguide.com/Virulent
http://uo.stratics.com/content/skills/bardingdifficulty.php
http://www.uoguide.com/Malefic
http://www.uoguide.com/Virulent
http://uo.stratics.com/content/skills/bardingdifficulty.php