Solid-stemmed wheat does not affect overwintering mortality of the wheat stem sawfly, Cephus cinctus.

For each response variable, separate models were run using CS, UN, or UN (1) as alternative covariance structures; the one with the lowest AICC value was selected for the final analysis, and the lowest level interaction with statistical significance ( p < 0.05) or marginal significance (0.1 > p > 0.05) was selected for the error term and comparisons of means (LSD, p < 0.05).

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Although there was a numerical trend towards higher mortality in the solid- than in the hollow-stemmed host, the main host factor (individual cultivar or solid stemmed cultivars pooled) effect and its interaction with exposure were not significant ( Figure 3 ).

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