Abstract
Feeding of Scolytus multistiatus (Marsham) on branches of American elm trees, Ulmus Americana L., that were injected with Bidrin® (3-hydroxy- N, N -di-methyl- cis -crotonamide dimethyl phosphate) was similar to that of untreated trees. Evidence of nonuniform translocation of the chemical throughout the tree crown, the girdling effect of Bidrin on the tree at the injection site, and the scattered phytotoxicity to the foliage, all were considered detrimental. Three complete generations and a partial emergence of a 4th generation of the beetles occurred in Oklahoma during 1967.
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