One of world’s worst weeds found in Otways Share this:Click to share on Facebook (Opens in new window)Click to share on Twitter (Opens in new window) Authorities discovered prohibited weed giant knotweed at Beech Forest, but have since removed the plant. Contact the authorby Colac Herald Contributor & A Staff Reporter May 2, 2011 Authorities have discovered a state prohibited weed in Colac and district. Unlock full access to Colac Herald - Subscribe today! Subscribe Now Share this:Click to share on Facebook (Opens in new window)Click to share on Twitter (Opens in new window) Tags: Rural