Research Objective
To determine whether PPO inhibitor-resistant kochia confirmed in Saskatchewan is cross-resistant to foliar and soil-applied PPO-inhibiting (Group 14) herbicides available in Western Canada.
Objective 4To continue monitoring kochia survey samples for PPO inhibitor (Group 14) resistance across the Canadian Prairies.
Objective 7To assess the impact of timing and implement/depth of soil disturbance on kochia emergence, density, and the soil seedbank.
To determine cross- or multiple-resistance to other herbicide modes of action in PPO inhibitor (Group 14)-resistant kochia.
Objective 5To assess efficacy of alternative herbicides to manage multiple herbicide-resistant kochia prior to crop seeding.
Objective 8To determine the mid/long-term impact of winter cereals and perennials in crop rotations on controlling multiple herbicide-resistant kochia.
To determine cross-resistance to PPO-inhibiting (Group 14) herbicides in PPO inhibitor-resistant kochia confirmed in SK; to determine cross- or multiple-resistance to other herbicide modes of action in PPO inhibitor (Group 14) resistant kochia; to determine the mechanism conferring resistance to PPO-inhibiting (Group 14) herbicides in kochia; to continue monitoring kochia survey samples for PPO inhibitor (Group 14) resistance across the Canadian Prairies; to assess efficacy of alternative herbicides to manage multiple herbicide-resistant kochia prior to crop seeding; to determine the mid/long-term utility and sustainability of strategic tillage for kochia management; to assess the impact of timing and implement/depth of soil disturbance on kochia emergence, density, and the soil seedbank; to determine the mid/long-term impact of winter cereals and perennials in crop rotations on multiple herbicide-resistant kochia.