The Dutch Elm disease is caused by Ceratostomella ulmi (Schwartz) Buis (1); and, two types of elm bark beetles (9) are its vectors (3,4,9). Growth of the fungus occurs in the xylem tissue, which predominantly is concerned with conduction of water to the foliage. The spores and bud cells of C. ulmi are smaller than the elm wood vessels (1,2). C. ulmi, too, can be transmitted through root grafts.
Iowa Science Teachers' Journal
© Copyright 1970 by the Iowa Academy of Science
Baugess, Lyle C. and Dalton, J. Lester
"The Toxic Activity of Main Trunk Wood From Diseased Dutch Elm Trees,"
Iowa Science Teachers Journal: Vol. 8:
2, Article 5.
Available at: https://scholarworks.uni.edu/istj/vol8/iss2/5