Show defects in southern pine most commonly recognized detects defects and blemishes that may occur in in southern pine are the following checks decay holes imperfect manufacture knots pitch pitch pockets pitch streaks pith shakes splits stain or discoloration wane and warp naturally the better grade gra de of southern pine the freer it is from defects or blemishes the decay is defined as disintegration of the wood substance due to the action of wood destroying fungi the words dote and rot mean the same I 1 as decay 1 |