Weed control with Bicyclopyrone + Bromoxynil in wheat

Chemical weed control options in wheat (Triticum aestivum L.) cropping systems of the Pacific Northwest (PNW) are currently limited due to the presence of resistant weed biotypes. The efficacy of a new post-emergence herbicide in wheat, bicyclopyrone + bromoxynil (Talinor®), was evaluated for mayweed chamomile (Anthemis cotula L.) and prickly lettuce (Lactuca serriola L.) control in eastern Washington and Oregon in 2016 and 2017. Bicyclopyrone + bromoxynil provided superior control of mayweed chamomile in winter wheat compared to pyrasulfotole + bromoxynil (Huskie®). Mayweed chamomile control was similar across all three rates of bicyclopyrone + bromoxynil used in the study. Pyrasulfotole + bromoxynil provided greater control of prickly lettuce in spring wheat than bicyclopyrone + bromoxynil except when bicyclopyrone + bromoxynil was applied at the highest rate. Bicyclopyrone + bromoxynil will provide winter wheat growers with an effective option for controlling mayweed chamomile, and at higher use rates, with an alternative option for prickly lettuce control in spring wheat.