Yield protection afforded by imidacloprid during Hessian fly infestation in six genotypes

The Hessian fly (Mayetiola destructor Say) is a gall midge that infests and feeds upon wheat (Triticum aestivum L.). Recently, new form of tolerance (QHft.nc-7D) was identified in the breeding line LA03136E71 (PI 700336). Partial resistance allows immature to thrive small numbers does not function like antibiosis. Little known about potential yield drag using partial resistance. In this study, we evaluated six genotypes: one containing QHft.nc-7D (LA03136E71), H13, four potentially susceptible genotypes. All genotypes were with two different seed treatment regiments imidacloprid: no times rate imidacloprid. tested planted six-to-eight replications full factorial design environments. Subsamples trial plots taken measure percent infested tillers number larvae/pupae per tiller. Plots harvested grain recorded. There significant (p[>F] < 0.05) reduction tiller related imidacloprid treatment. Imidacloprid significantly (p[>T] reduced for LA03136E71. > increase associated This indicates application on did improve yet infestation. Therefore, QHft.nc-7D, while allowing plant, compromise yield.