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Eight plant introductions and four commercial varieties of spring wheat were evaluated for stem-solidness at five locations. Location and location x variety effects were significant, indicating that entries were influenced by environment, and differentially so by some environments. Differences among locations in average plant and internode stem-solidness scores indicated that the six P.I. 94585 selections were most stable and least influenced by environment. Pith development of the top internode was influenced most by environment.
Key Words: Cephus cinctus Nort. wheat stem sawfully environment
2 Research Agronomist, Crops Research Division, and Entomologist, Entomology Research Division, ARS, USDA. Acknowledgment is made to M. A. Berg for assistance during the study and to Branch Experiment Station personnel, V. R. Stewart, D. E. ]3aldridge, and H. R. Guenther for growing and harvesting some of the experimental plots.
Received for publication April 24, 1967.
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