Poisonous

From Guild Wars Wiki

Poisonous is a weapon upgrade that lengthens the duration of the poison condition that you inflict upon your foes by 33%. This affects conditions inflicted by any skill, not just from attack skills, as long as the weapon is equipped when the skill is used.

[edit] In-game description

Lengthens poison duration on foes by 33%

[edit] Upgrade components which provide this bonus

• Axe Haft
• Sword Hilt
• Dagger Tang
• Scythe Snathe
• Bow String
• Spearhead