Detective Dendro and Codit discover three different species of oak from two different locations with one similar spiraling symptom. Can they determine what is causing the spiral bumps forming on these oak twigs? Find out on this episode of Detective Dendro®. *(A, U, M, T, L, Bs) Article published in the December 2011 issue of Arborist News.
CEUs for this quiz may be earned only once during the life of your certification.