In 2010, limited evidence was found for differences in plant heights among treatments (Table 3). Heights were marginally lower (P ¼ 0.054) in untreated cuts than in cuts treated with chlorantraniliprole or thiamethoxam (Table 3). In 2011, seed treatments had small but significant (P < 0.05) effects on plant height. Plants were generally taller in cuts treated with thiamethoxam or clothianidin than in untreated or chlorantraniliprole-treated plots. No differences in plant heights were detected among untreated and chlorantraniliprole treated plots (Table 3).