Phloem Necrosis, a Destructive Disease of the American Elm |
Common terms and phrases
adjacent trees affected by elm American elm resistant appear areas Arkansas butterscotch discoloration buttress roots color control of phloem current season growth Dayton and Columbus dead trees destruction discolored inner bark discolored layer disease occurs Diseased elms diseased trees dying of elms early symptoms elm phloem necrosis elms are resistant healthy stem healthy trees holly leaf identification of phloem Infected elms infected trees insect that transmits insecticides Kansas City Kentucky layer of inner leaf hopper leaf symptoms cause Louis Missouri counties moline and holly natural root grafting necrosis of elm necrosis was identified observed occurs between roots odor of wintergreen Ohio Oklahoma partial defoliation probable resistant to phloem roots of adjacent Siberian Chinese slippery elm species of elm susceptible to phloem suspected trees symptom of phloem T. W. Bretz thin layer tissue transmission trunk unpredictable number varieties vase virus disease winged elm yellow to butterscotch yellowing and falling