WPBR needs to infect both a currant or gooseberry plant and a white pine to complete its life cycle. Diseased pine branches should be pruned out of the tree before the infection comes within 4 inches ...

White Pine. Adopted by the Legislature of 1945 ... Flowers (strobili) occur on the tree. Cones are 4-8 inches in length, usually slightly curved. Cone scales are thin and never have prickles. Cones ...