Abstract
The relative susceptibilities of 33 poplar clones to Chrysomela Scripta F. were measured in 1977 during a season of heavy infestation of this insect in a clonal orchard at Ames, Iowa. Damage to trees was estimated by using the criteria of shoots no longer usable for cuttings and leaf area lost to beetle feeding. Of the 3 clones showing little or no damage in either category, 2 had Populus alba L. parentage. Other than P. alba , parentage had little influence on beetle preference. Although most clones resumed growth during the season, shoot height growth was reduced as much as 80% in severely defoliated clones.
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