John Russell and Alvin Yanchuk British Columbia Forest Service Western redcedar challenges Growth/adaptability      Heartwood durability Ungulate damage               Cedar leaf blight • Currently multiple populations  and generations • Move to one durable population • Cross resistance • Known and future unknown pests Growth and adaptability Growth and adaptability • ~1000 parental  BVs for volume • N. California to N. British Columbia Growth and adaptability • ~1000 parental  BVs for volume • N. California to N. British Columbia = top BV southern PNW parents Heartwood pathogens Heartwood durability and secondary extractives Heartwood durability and secondary extractives living heartwood: tropolones wood in service: lignans antimicrobial;    concentration; antimicrobial; leaching concentration Heartwood durability and secondary extractives living heartwood: tropolones wood in service: lignans antimicrobial;    concentration; antimicrobial; leaching concentration 350 CVs for heartwood extractives γ α- β Unknown thujaplici thujaplicinthujaplicin volume lignan n 0.86 0.48 0.15 0.49 0.42 Plicatic acid Unknown 0.33 0.17 0.46 0.35 lignan 0.56 0.66 0.44 α-thujaplicin 0.33 0.28 β-thujaplicin 0.31 γ-thujaplicin Cedar leaf blight (Didymascella thujina) • occurs throughout western redcedar range • more extensive in warm, humid environments •growth reduction/mortality • increasing over last two decades •1000 parental BVs as per volume •resistance related to climate of parent origin