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ARS Home » Northeast Area » Beltsville, Maryland (BARC) » Beltsville Agricultural Research Center » Sustainable Agricultural Systems Laboratory » Research » Research Project #418954

Research Project: Managing Cover Crop-herbicide Interactions to Improve Herbicide Efficacy

Location: Sustainable Agricultural Systems Laboratory

Project Number: 8042-22000-167-22-I
Project Type: Interagency Reimbursable Agreement

Start Date: Apr 1, 2018
End Date: Mar 31, 2021

Objective 1: Quantify synergistic impact of rye residues and herbicides on weed seedling growth and survival under controlled environment and field conditions. Objective 2: Elucidate physiological impact of rye residues on herbicide metabolism of weed seedlings.

SASL will conduct controlled environment and field studies (Urbana, IL, and Beltsville, MD) of the independent and combined effects of soil incorporated rye residues and S-metolachlor on the growth and survival of Amaranthus retroflexus and Amaranthus tuberculatus seedlings. Within greenhouse studies only, we will quantify the dose response of Amaranthus spp. mortality to S-metolachlor in soils with and without rye amendment. Finally, we will use standard herbicide metabolism laboratory procedures to determine whether shifts in S-metolachlor dose response of Amaranthus seedlings is due to altered detoxification, altered translocation or another mechanism.