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A First Step in Breeding Resistant Elms

Dutch elm disease caused by Ceratocystis Willi left a serious gap in the American landscape. Spray programs to control the insect vector are effective but at a high cost in money and risk to wildlife. Entomologists wish for a better solution. Systemic fungicides to kill the fungus and not the tree offer promise but their effectiveness is not yet known. The breeding of genetically resistant varieties offers much promise in the long run. Once produced, a new variety does not require additional expense for control and has no undesirable side effects.


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Author(s): Johnathan W. Wright

Publication: Tree Improvement and Genetics - Central States Forest Tree Improvement Conference - 1968